public function getColumnDisplayName($columnName) {
        return isset($this->columnDisplayNames[$columnName]) ? $this->columnDisplayNames[$columnName] : $columnName;
    }
public function getColumnDisplayName($columnName) {
        return isset($this->columnDisplayNames[$columnName]) ? $this->columnDisplayNames[$columnName] : $columnName;
    }
Returns the name to display for given column name.

@param String $columnName The name of the column.

@return String The name that is displayed for given column name.