public function getRegistryNames() : array
    {
        $names = [];
        foreach ($this->getRegistry() as $registryName=>$registryValue)
        {
            $names[] = $registryName;
        }

        return $names;
    }
public function getRegistryNames() : array
    {
        $names = [];
        foreach ($this->getRegistry() as $registryName=>$registryValue)
        {
            $names[] = $registryName;
        }

        return $names;
    }
public function getRegistryNames ( ) : array { $ names = [ ] ; foreach ( $ this -> getRegistry ( ) as $ registryName => $ registryValue ) { $ names [ ] = $ registryName ; } return $ names ; }
returns the names of objects stored in the registry

@return array
returns the names of objects stored in the registry