remove method
Returns a copy of this map where key
and its associated value are
removed if present.
Implementation
ImmortalMap<K, V> remove(Object? key) =>
_mutateAsMap((map) => map..remove(key));
Returns a copy of this map where key
and its associated value are
removed if present.
ImmortalMap<K, V> remove(Object? key) =>
_mutateAsMap((map) => map..remove(key));