@Override
  public int getChildRole(@NotNull ASTNode child) {
    LOG.assertTrue(child.getTreeParent() == this);
    if (child == getFirstChildNode()) return ChildRole.OPERAND;
    if (child == getLastChildNode()) return ChildRole.OPERATION_SIGN;
    return ChildRoleBase.NONE;
  }
@Override
  public int getChildRole(@NotNull ASTNode child)