public function registered($name) {
		$name = $this->getAlias($name);

		return array_key_exists($name, $this->components);
	}
public function registered($name) {
		$name = $this->getAlias($name);

		return array_key_exists($name, $this->components);
	}
public function registered ( $ name ) { $ name = $ this -> getAlias ( $ name ) ; return array_key_exists ( $ name , $ this -> components ) ; }
Determine component has been registered
@param  string $name component name
@return boolean
Determine component has been registered