apply method

@override Map<String, dynamic> apply(Map<String, dynamic> row)

Applies this operation to row and returns the resulting row.

row is a private copy owned by the migration pipeline; implementations may mutate and return it, or return a new map.

Implementation

@override
Map<String, dynamic> apply(Map<String, dynamic> row) {
  if (!applyIfAbsent && !row.containsKey(name)) return row;
  row[name] = transform(row[name], row);
  return row;
}