index.js
function inheritGulp() {
  function TaskDoc() {
    this.taskList = new TaskList();
    gulp.Gulp.call(this);
  }
  TaskDoc.prototype = gulp;
  return new TaskDoc();
}
function inheritGulp() {
  function TaskDoc() {
    this.taskList = new TaskList();
    gulp.Gulp.call(this);
  }
  TaskDoc.prototype = gulp;
  return new TaskDoc();
}
function inheritGulp ( ) { function TaskDoc ( ) { this . taskList = new TaskList ( ) ; gulp . Gulp . call ( this ) ; } TaskDoc . prototype = gulp ; return new TaskDoc ( ) ; }
Return a new instance that is inherited from Gulp
@returns {TaskDoc}
Return a new instance that is inherited from Gulp