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                <?php declare(strict_types=1);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace OpenStack\Metric\v1\Gnocchi;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use OpenStack\Common\Service\AbstractService;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use OpenStack\Metric\v1\Gnocchi\Models\Metric;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use OpenStack\Metric\v1\Gnocchi\Models\Resource;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use OpenStack\Metric\v1\Gnocchi\Models\ResourceType;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * Gnocci Metric v1 Service class  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @property Api $api  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @package OpenStack\Metric\v1\Gnocchi  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class Service extends AbstractService  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Retrieves a collection of \OpenStack\Metric\v1\Gnocchi\Models\ResourceType type in a generator format.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return \Generator  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function listResourceTypes(): \Generator  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $this->model(ResourceType::class)->enumerate($this->api->getResourceTypes(), []);  | 
            
                            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Retrieves a collection of \OpenStack\Metric\v1\Gnocchi\Models\Resource type in a generator format.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param array $options {@see \OpenStack\Metric\v1\Gnocchi\Api::getResources} | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return \Generator  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public function listResources(array $options = []): \Generator  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    { | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $this->injectGenericType($options);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        return $this->model(Resource::class)->enumerate($this->api->getResources(), $options);  | 
            
                            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Retrieves a Resource object and populates its unique identifier object. This operation will not perform a GET or  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * HEAD request by default; you will need to call retrieve() if you want to pull in remote state from the API.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param array $options  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return Resource  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function getResource(array $options = []): Resource  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->injectGenericType($options);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        /** @var Resource $resource */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $resource = $this->model(Resource::class);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $resource->populateFromArray($options);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $resource;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Retrieves a collection of \OpenStack\Metric\v1\Gnocchi\Models\Resource type in a generator format.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param array $options {@see \OpenStack\Metric\v1\Gnocchi\Api::searchResources} | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return \Generator  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function searchResources(array $options = []): \Generator  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->injectGenericType($options);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                         * $options['criteria'] must send as STRING  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                         * This will check input $options and perform json_encode if needed.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                         */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if (isset($options['criteria']) && !is_string($options['criteria'])) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $options['criteria'] = json_encode($options['criteria']);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                         * We need to manually add content-type header to this request  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                         * since searchResources method sends RAW request body.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                         */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $options['contentType'] = 'application/json';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $this->model(Resource::class)->enumerate($this->api->searchResources(), $options);  | 
            
                            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Retrieves a Metric object and populates its unique identifier object. This operation will not perform a GET or  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * HEAD request by default; you will need to call retrieve() if you want to pull in remote state from the API.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param string $id  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return Metric  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function getMetric(string $id): Metric  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        /** @var Metric $metric */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $metric = $this->model(Metric::class);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $metric->populateFromArray(['id' => $id]);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $metric;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Retrieves a collection of Metric type in a generator format.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param array $options {@see \OpenStack\Metric\v1\Gnocchi\Api::getMetrics} | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return \Generator  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function listMetrics(array $options = []): \Generator  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $this->model(Metric::class)->enumerate($this->api->getMetrics(), $options);  | 
            
                            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * If options does not have type, this will inject $options['type'] = 'generic'  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @internal  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param array $options  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private function injectGenericType(array &$options)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if (empty($options) || !isset($options['type'])) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $options['type'] = Resource::RESOURCE_TYPE_GENERIC;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                }  | 
            
            
                                                        
            
                                    
            
            
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Let’s take a look at an example:
In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different implementation of User which does not have a getDisplayName() method, the code will break.
Available Fixes
Change the type-hint for the parameter:
Add an additional type-check:
Add the method to the interface: