stylelint-bundle-worker.js
function(type, fn) {
    if (this.types.indexOf(type) === -1) {
      this.types.push(type);
    }
    this.parsers[type] = fn.bind(this);
    return this;
  }
function(type, fn) {
    if (this.types.indexOf(type) === -1) {
      this.types.push(type);
    }
    this.parsers[type] = fn.bind(this);
    return this;
  }
Set parser `name` with the given `fn`
@param {String} `name`
@param {Function} `fn`
@api public