How to use

CHAINABLE_EVENT_EMITTER_METHODS

function

in

Array

LabeledPipe
 .CHAINABLE_EVENT_EMITTER_METHODS
 .forEach(method => {
  LabeledPipe.prototype[method] = function (...args) {
   if (!this._cursor) {
    throw new Error('No event emitter under cursor');
   }

   const stepIndex = this._cursor - 1;
   const stepsCopy = this.steps();

   stepsCopy[stepIndex] = copy(stepsCopy[stepIndex]);
   stepsCopy[stepIndex].events = (stepsCopy[stepIndex].events || []).concat({
    method,
    args,
   });

   return new LabeledPipe(this.build.displayName, stepsCopy, this._cursor);
  };
 });