@Override
  public ASTNode findChildByRole(int role) {
    LOG.assertTrue(ChildRole.isUnique(role));

    switch (role) {
      case ChildRole.LBRACE:
        return findChildByType(JavaTokenType.LBRACE);

      case ChildRole.RBRACE:
        return findChildByType(JavaTokenType.RBRACE);

      default:
        return null;
    }
  }
@Override
  public ASTNode findChildByRole(int role)