method isAggregateFunction documentation in bbn\Db

Returns true if the column name is an aggregate function

X::adump($ctrl->db->isAggregateFunction("name")); // false
X::adump($ctrl->db->isAggregateFunction("ID")); // true

function(string $f)
  {
    $cls = '\\bbn\\Db\\languages\\'.$this->engine;
    return $cls::isAggregateFunction($f);
  }