code: public function isValidColumnName($strColName)
      {
          return $this->isValidMySQLIdentifier($strColName)
              && !$this->isReservedWord($strColName)
              && !$this->isReserveColumnPostFix($strColName);
      }
docs: Checks whether the column with the given name is a MetaModel system column.
  
  @param string $strColName The name of the column.
  
  @return bool true if the column is a system column, false otherwise.