whole_func_string: function forward(event, source, target) {
      source.on(event, target.emit.bind(target, event));
  }
func_code_string: function forward(event, source, target) {
      source.on(event, target.emit.bind(target, event));
  }
func_documentation_string: Forward events of the specified type from source emitter to target.
  @param {string} event
  @param {EventEmitter} source
  @param {EventEmitter} target