@Nullable
  public static PsiReturnStatement getNextReturnStatement(PsiStatement statement) {
    while (true) {
      PsiElement nextStatement = PsiTreeUtil.skipWhitespacesAndCommentsForward(statement);
      if (nextStatement instanceof PsiReturnStatement) return (PsiReturnStatement)nextStatement;
      PsiElement parent = statement.getParent();
      if (parent instanceof PsiCodeBlock) {
        PsiStatement[] statements = ((PsiCodeBlock)parent).getStatements();
        if (statements.length == 0 || statements[statements.length - 1] != statement) return null;
        parent = parent.getParent();
      }
      if (!(parent instanceof PsiIfStatement) && !(parent instanceof PsiBlockStatement)) return null;
      statement = (PsiStatement)parent;
    }
  }
@Nullable
  public static PsiReturnStatement getNextReturnStatement(PsiStatement statement)