ntById('soundsEnabled');
        checkbox.checked = (state) ? 'checked' : '';
        if (sessionStorage) {
          sessionStorage.setItem('soundsEnabled', state);
        }
      }
      function fakeDrag(id, dx, dy, opt_workspace) {
        var ws = opt_workspace || Blockly.getMainWorkspace();
        var blockToDrag = ws.getBlockById(id);

        if (!blockToDrag) {
          fakeDragWrapper();
          return;
        }
        var blockTop = blockToDrag.svgGroup_.getBoundingClientRect().top;
      