code: function () {
              var val,
                  triggerChange = false,
                  data = null,
                  self = this,
                  oldData = this.data();
  
              if (arguments.length === 0) {
                  return this.opts.element.val();
              }
  
              val = arguments[0];
  
              if (arguments.length > 1) {
                  triggerChange = arguments[1];
              }
  
              if (this.select) {
                  this.select
                      .val(val)
                      .find(":selected").each2(function (i, elm) {
                          data = self.optionToData(elm);
                          return false;
                      });
                  this.updateSelection(data);
                  this.setPlaceholder();
                  if (triggerChange) {
                      this.triggerChange({added: data, removed:oldData});
                  }
              } else {
                  // val is an id. !val is true for [undefined,null,'',0] - 0 is legal
                  if (!val && val !== 0) {
                      this.clear(triggerChange);
                      return;
                  }
                  if (this.opts.initSelection === undefined) {
                      throw new Error("cannot call val() if initSelection() is not defined");
                  }
                  this.opts.element.val(val);
                  this.opts.initSelection(this.opts.element, function(data){
                      self.opts.element.val(!data ? "" : self.id(data));
                      self.updateSelection(data);
                      self.setPlaceholder();
                      if (triggerChange) {
                          self.triggerChange({added: data, removed:oldData});
                      }
                  });
              }
          }
docs: single