code: function updateIndicator(id, visible, style, tooltip) {
          if (!_init && !!brackets.test) {
              console.error("StatusBar API invoked before status bar created");
              return;
          }
  
          var $indicator = $("#" + id.replace(_indicatorIDRegexp, "-"));
  
          if ($indicator) {
  
              if (visible) {
                  $indicator.show();
              } else {
                  $indicator.hide();
              }
  
              if (style) {
                  $indicator.removeClass();
                  $indicator.addClass(style);
              } else {
                  $indicator.removeClass();
                  $indicator.addClass("indicator");
              }
  
              if (tooltip) {
                  $indicator.attr("title", tooltip);
              }
          }
      }
docs: Updates a status indicator
  @param {string} id Registration id of the indicator to be updated.
  @param {boolean} visible Shows or hides the indicator over the statusbar.
  @param {string=} style Sets the attribute "class" of the indicator.
  @param {string=} tooltip Sets the attribute "title" of the indicator.