code: function () {
              var placeholder = this.getPlaceholder(),
                  maxWidth = this.getMaxSearchWidth();
  
              if (placeholder !== undefined  && this.getVal().length === 0 && this.search.hasClass("select2-focused") === false) {
                  this.search.val(placeholder).addClass("select2-default");
                  // stretch the search box to full width of the container so as much of the placeholder is visible as possible
                  // we could call this.resizeSearch(), but we do not because that requires a sizer and we do not want to create one so early because of a firefox bug, see #944
                  this.search.width(maxWidth > 0 ? maxWidth : this.container.css("width"));
              } else {
                  this.search.val("").width(10);
              }
          }
docs: multi