1  export const IApplicationSymbol = Symbol.for('IApplication');
 2  
 3  /**
 4   * The main application holding everything together.
 5   */
 6  export interface IApplication {
 7  	/**
 8  	 * Gets a service identified by its symbol.
 9  	 * @param identifier symbol for the service.
10  	 * @returns The requested service.
11  	 */
12  	getService<T>(identifier: symbol): T | undefined;
13  }