B2G/gecko/browser/devtools/shared/Undo.jsm
/**
   * Redo the most recently undone action.
   *
   * @return true if an action was redone.
   */
Redo the most recently undone action.
@return true if an action was redone.
Redo the most recently undone action . @return true if an action was redone .
function Undo_canRedo()
  {
    if (!this.canRedo()) {
      return false;
    }
    this._stack[this._index++].do();
    this._change();
    return true;
  }
function Undo_canRedo ( ) { if ( ! this . canRedo ( ) ) { return false ; } this . _stack [ this . _index ++ ] . do ( ) ; this . _change ( ) ; return true ; }
Redo the most recently undone action.
Redo the most recently undone action .