public ImmutableIntIntMap newWithKeyValue(int key, int value)
{
MutableIntIntMap map = new IntIntHashMap(this.size() + 1);
map.putAll(this);
map.put(key, value);
return map.toImmutable();
}
public ImmutableIntIntMap newWithoutKey(int key)
{
MutableIntIntMap map = new IntIntHashMap(this.size());