package {

	public class Manager
	{
		/**
		 * var to be used by the singleton pattern to return the instance of the class.
		 */		
		private static var manager : Manager;

		/**
		 * Internal constructor. Should not be called from outside this class. 
		 * 
		 * @param enforcer	Enforce the creation of one class only. 
		 * 
		 */
		public function Manager(enforcer:AccessRestriction)
		{
			// TODO: throw exception
			if ( enforcer == null )
			{
				throw new Error("Manager error enforcer input param is undefined" );
			}
		}

		
		/**
		 * Method function to retrieve instance of the class
		 *  
		 * @return The same instance of the class
		 * 
		 */
		public static function getInstance() : Manager
		{
			if( manager == null )
				manager = new Manager(new AccessRestriction());
			
			return manager
		}
	}
}

class AccessRestriction {}