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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @copyright  Copyright (c) Flipbox Digital Limited  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @license    https://flipboxfactory.com/software/hubspot/license  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @link       https://www.flipboxfactory.com/software/hubspot/  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace flipbox\hubspot\services\resources\traits;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use craft\base\Element;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use craft\base\ElementInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use flipbox\hubspot\criteria\ResourceCriteriaInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use flipbox\hubspot\fields\Resources;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use flipbox\hubspot\helpers\TransformerHelper;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use League\Pipeline\PipelineBuilderInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @author Flipbox Factory <[email protected]>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @since 1.0.0  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                 */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                trait UpsertByElementTrait  | 
            
            
                                                                        
                            
            
                                    
            
            
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                { | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @param ResourceCriteriaInterface $criteria  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @return PipelineBuilderInterface  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                    public abstract function upsertPipelineByCriteria(ResourceCriteriaInterface $criteria): PipelineBuilderInterface;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @param ElementInterface $element  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @param Resources $field  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @return string|null  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                    protected abstract function transformElementId(ElementInterface $element, Resources $field);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @param Resources $field  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @param null $criteria  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @return ResourceCriteriaInterface  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                    protected abstract function resolveCriteria(Resources $field, $criteria = null): ResourceCriteriaInterface;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @inheritdoc  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @return PipelineBuilderInterface  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function upsertByElement(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        ElementInterface $element,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        Resources $field,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $criteria = null  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    ): PipelineBuilderInterface { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $this->upsertPipelineByElement(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $element,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $field,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $criteria  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        )($element);  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                    }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @inheritdoc  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @return PipelineBuilderInterface  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function upsertPipelineByElement(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        ElementInterface $element,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        Resources $field,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $criteria = null  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    ): PipelineBuilderInterface { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        /** @var Element $element */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $criteria = $this->resolveCriteria($field, $criteria);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if (empty($criteria->getId()) || $criteria->getId() === $field::DEFAULT_HUBSPOT_ID) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $criteria->id = $this->transformElementId($element, $field);  | 
            
                            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if (empty($criteria->getPayload())) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $criteria->payload = $this->transformElementPayload($element, $field);  | 
            
                            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        TransformerHelper::populateTransformerCollection(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $criteria->getTransformer(),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            [  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                'resource' => [get_class($element)]  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            ]  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $this->upsertPipelineByCriteria(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $criteria  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        );  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                    }  | 
            
            
                                                        
            
                                    
            
            
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                }  | 
            
            
                                                        
            
                                    
            
            
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If you access a property on an interface, you most likely code against a concrete implementation of the interface.
Available Fixes
Adding an additional type check:
Changing the type hint: