public ImmutableCharIntMap newWithKeyValue(char key, int value)
{
MutableCharIntMap map = new CharIntHashMap(this.size() + 1);
map.putAll(this);
map.put(key, value);
return map.toImmutable();
}
public ImmutableCharIntMap newWithoutKey(char key)
{
MutableCharIntMap map = new CharIntHashMap(this.size());