map<TResult extends Object?>  method 
    Null safety
- TResult $default(- _DataRow value
 
- {required TResult byIndex(- DataRowByIndex value
 
@optionalTypeArgs, inherited
    Implementation
@optionalTypeArgs
TResult map<TResult extends Object?>(
  TResult Function(_DataRow value) $default, {
  required TResult Function(DataRowByIndex value) byIndex,
}) =>
    throw _privateConstructorUsedError;