getPhrase(name) {
    for (var i in this.phrases) {
      if (this.phrases[i].name === name) {
        return this.phrases[i];
      }
    }
  }
Get a phrase from this part, based on the name it was
 given when it was created. Now you can modify its array.

 @method  getPhrase
 @for p5.Part
 @param  {String} phraseName