src/Container.php
protected function createObjectUsingFactory(string $typeName, Factory $factory, ?bool $nullable = false): ?object
    {
        $this->underConstruction[$typeName] = true;
        
        try {
            // Assemble arguments and scope config objects to the bound type:
            $object = ($factory->callback)(...$this->populateArguments($factory->getReflection(), null, $typeName));
            
            if (!$object instanceof $typeName) {
                if ($object === null && $nullable) {
                    return null;
                }
                
                $type = \is_object($object) ? \get_class($object) : \gettype($object);
                
                throw new ContainerException(\sprintf('Factory must return an instance of %s, returned value is %s', $typeName, $type));
            }
        } finally {
            unset($this->underConstruction[$typeName]);
        }
        
        return $object;
    }
protected function createObjectUsingFactory(string $typeName, Factory $factory, ?bool $nullable = false): ?object
    {
        $this->underConstruction[$typeName] = true;
        
        try {
            // Assemble arguments and scope config objects to the bound type:
            $object = ($factory->callback)(...$this->populateArguments($factory->getReflection(), null, $typeName));
            
            if (!$object instanceof $typeName) {
                if ($object === null && $nullable) {
                    return null;
                }
                
                $type = \is_object($object) ? \get_class($object) : \gettype($object);
                
                throw new ContainerException(\sprintf('Factory must return an instance of %s, returned value is %s', $typeName, $type));
            }
        } finally {
            unset($this->underConstruction[$typeName]);
        }
        
        return $object;
    }
protected function createObjectUsingFactory ( string $ typeName , Factory $ factory , ? bool $ nullable = false ) : ? object { $ this -> underConstruction [ $ typeName ] = true ; try { // Assemble arguments and scope config objects to the bound type: $ object = ( $ factory -> callback ) ( ... $ this -> populateArguments ( $ factory -> getReflection ( ) , null , $ typeName ) ) ; if ( ! $ object instanceof $ typeName ) { if ( $ object === null && $ nullable ) { return null ; } $ type = \ is_object ( $ object ) ? \ get_class ( $ object ) : \ gettype ( $ object ) ; throw new ContainerException ( \ sprintf ( 'Factory must return an instance of %s, returned value is %s' , $ typeName , $ type ) ) ; } } finally { unset ( $ this -> underConstruction [ $ typeName ] ) ; } return $ object ; }
Create a new object instance using a pre-configured factory callback.

@param string $typeName Fully-qualified name of the bound type.
@param array $factory Definition of the factory (callable and reflection).
@param string $nullable Allow returning null in case of a missing dependency?
@return object
Create a new object instance using a pre - configured factory callback .