public static function addDependency($dependency) {
		if (!isset(self::$instance[get_class($dependency)])) {
			self::$instance[get_class($dependency)] = $dependency;
		}
	}
public static function addDependency($dependency) {
		if (!isset(self::$instance[get_class($dependency)])) {
			self::$instance[get_class($dependency)] = $dependency;
		}
	}
public static function addDependency ( $ dependency ) { if ( ! isset ( self :: $ instance [ get_class ( $ dependency ) ] ) ) { self :: $ instance [ get_class ( $ dependency ) ] = $ dependency ; } }
Manually add an instance to the DependencyManager.

@param mixed $dependency
Manually add an instance to the DependencyManager .