add method

@override bool add(String key, V value)

Insert a key and value association.

key is a string to be transformed via keyMapping into a key.

Return true if (key, value) pair did not already exist, false otherwise.

Throws ArgumentError if key is empty or null.

Throws ArgumentError if keyMapping(key) is empty or null.

Implementation

@override
bool add(String key, V value) {
  ArgumentError.checkNotNull(value, 'value');
  final addResult = _add(_root, _mapKeyNonEmpty(key).runes.toList(), value);

  _root = addResult.rootNode;

  // Operation may change keys, values, both, or nothing
  if (addResult.newKey) {
    _version.value.incKeysVersion();
  }
  if (addResult.valueChanged) {
    _version.value.incValuesVersion();
  }

  return addResult.newKey || addResult.valueChanged;
}