nest method

void nest(String name, [ String symbol = '_' ])

Implementation

void nest(String name, [String symbol = '_']) {
  final Map<String, dynamic> nested = {};

  forEach((key, value) {
    if (key.startsWith('$name$symbol')) {
      if (key != name) {
        final nestedName = key.substring(name.length + symbol.length);

        if (nestedName.isNotEmpty) {
          nested[nestedName] = value;
        }
      } else if (this[name] is Map) {
        (this[name] as Map).forEach((nestKey, nestValue) {
          nested[nestKey] = nestValue;
        });
      }
    }
  });

  if (nested.isNotEmpty) {
    removeWhere((key, _) => key.startsWith('$name$symbol'));
    this[name] = nested;
  }
}