code: function set(form_id, input_name, input_value) {
          this._checkInit(form_id);
          var input = this._collection[form_id].getInput(input_name);
          input.value = input_value;
      }
docs: /*
  Get and set form data methods
   
  Set new value of real DOM input or virtual input
  Actually fires change event and values are set in _attachChangeAndDefaultFileEvent()
  
  @param {string} form_id
  @param {string} input_name
  @param {string|Blob|Object} input_value