groupByKey method

Map<T, List<T>> groupByKey(
  1. String key
)

Group the objects according to key

Example:

list.groupByKey("key")

Implementation

Map<T, List<T>> groupByKey(String key) => groupBy((T e) {
      if (e is Map && e.containsKey(key)) {
        return e[key] as T;
      }
      throw ArgumentError('Key not found: $key');
    });