only method

Map<String, String> only(
  1. List<String> keys
)

Returns a new map containing only the entries in keys.

Example:

final style = {'color': 'red', 'font-size': '10px', 'font-weight': 'bold'};
final onlyColorAndSize = style.only(['color', 'font-size']);
// returns: {'color': 'red', 'font-size': '10px'}

Implementation

Map<String, String> only(List<String> keys) {
  final map = <String, String>{};
  for (final key in keys) if (containsKey(key)) map[key] = this[key]!;
  return map;
}