@Override
  public boolean flip(@NotNull PsiElement left, @NotNull PsiElement right) {
    if (left instanceof PsiVariable leftVariable && right instanceof PsiVariable rightVariable) {
      if (left instanceof PsiParameter || right instanceof PsiParameter) return false;
      if (left instanceof PsiRecordComponent || right instanceof PsiRecordComponent) return false;
      if (left instanceof PsiEnumConstant && ErrorUtil.containsDeepError(left) ||
          right instanceof PsiEnumConstant && ErrorUtil.containsDeepError(right)) {
        return false;
      }
      // flips multiple variables in a single declaration
      final PsiIdentifier leftIdentifier = leftVariable.getNameIdentifier();
      assert leftIdentifier != null;
      final PsiIdentifier rightIdentifier = rightVariable.getNameIdentifier();
      assert rightIdentifier != null;
      PsiElement leftLast = leftVariable.getLastChild();
      leftLast = PsiUtil.isJavaToken(leftLast, JavaTokenType.SEMICOLON) ? leftLast.getPrevSibling() : leftLast;
      PsiElement rightLast = rightVariable.getLastChild();
      rightLast = PsiUtil.isJavaToken(rightLast, JavaTokenType.SEMICOLON) ? rightLast.getPrevSibling() : rightLast;
      left.addRangeBefore(rightIdentifier, rightLast, leftIdentifier);
      right.addRangeBefore(leftIdentifier, leftLast, rightIdentifier);
      left.deleteChildRange(leftIdentifier, leftLast);
      right.deleteChildRange(rightIdentifier, rightLast);
      return true;
    }
    return false;
  }
@Override
  public boolean flip(@NotNull PsiElement left, @NotNull PsiElement right)