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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace CSSPrites;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use CSSPrites\ImageProcessor\ImageProcessorInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use League\Container\ServiceProvider as BaseServiceProvider;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * ServiceProvider to register all the needed dependencies.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @codeCoverageIgnore  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                 */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                class ServiceProvider extends BaseServiceProvider  | 
            
            
                                                                        
                            
            
                                    
            
            
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                { | 
            
            
                                                                        
                            
            
                                    
            
            
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                    protected $provides = [  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        'configuration',  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        'image.processor',  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        'sprite.processor.horizontal',  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        'sprite.processor.vertical',  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        'sprite.processor.simplebinpacking',  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        'commands.generate',  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    ];  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public function register()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $container = $this->getContainer();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        // AutoConfigure ContainerAwareInterface  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $container->inflector('League\Container\ContainerAwareInterface') | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            ->invokeMethod('setContainer', [$container]); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        // Registering Configuration as singleton  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $container->singleton('configuration', 'CSSPrites\Configuration'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        // Registering Slugifier as singleton  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $container->singleton('slugifier', 'CSSPrites\Slugifier\SlugifySlugifier'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        // Registering Image Processor  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $container->add('image.processor', 'CSSPrites\ImageProcessor\ImagineImageProcessor'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        // AutoConfigure Image Processor  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $container->inflector('CSSPrites\ImageProcessor\ImageProcessorInterface', function (ImageProcessorInterface $instance) use ($container) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $instance->setConfig($container->get('configuration')->get('image.processor')); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        });  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        // Registering Sprites Processors  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $container->add('sprite.processor.horizontal', 'CSSPrites\SpriteProcessor\HorizontalSpriteProcessor') | 
            
                            
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                             ->withArgument('image.processor'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $container->add('sprite.processor.vertical', 'CSSPrites\SpriteProcessor\VerticalSpriteProcessor') | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                             ->withArgument('image.processor'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $container->add('sprite.processor.simplebinpacking', 'CSSPrites\SpriteProcessor\SimpleBinPackingSpriteProcessor') | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                             ->withArgument('image.processor'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        // Registering ConsoleCommands  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $container->add('commands.generate', 'CSSPrites\Commands\GenerateCommand'); | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                    }  | 
            
            
                                                        
            
                                    
            
            
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                }  | 
            
            
                                                        
            
                                    
            
            
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It seems like the method you are trying to call exists only in some of the possible types.
Let’s take a look at an example:
Available Fixes
Add an additional type-check:
Only allow a single type to be passed if the variable comes from a parameter: