updateValue method

V updateValue(
  1. K key,
  2. V update(
    1. V
    ), {
  3. V ifAbsent()?,
})

As Map.update.

Implementation

V updateValue(K key, V Function(V) update, {V Function()? ifAbsent}) =>
    _safeMap.update(key, update, ifAbsent: ifAbsent);