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 (!row.containsKey(from)) return row;
  if (row.containsKey(to)) {
    row.remove(from);
    return row;
  }
  row[to] = row.remove(from);
  return row;
}