@Override
    protected boolean isEnabled(@NotNull ThreesideDiffChangeBase change) {
      Side side1 = myModifiedSide.select(Side.LEFT, null, Side.RIGHT);
      if (side1 != null && change.isChange(side1)) return true;

      Side side2 = mySourceSide.select(Side.LEFT, null, Side.RIGHT);
      if (side2 != null && change.isChange(side2)) return true;

      return false;
    }
@Override
    protected boolean isEnabled(@NotNull ThreesideDiffChangeBase change)