public ImmutableIntDoubleMap newWithKeyValue(int key, double value)
{
MutableIntDoubleMap map = new IntDoubleHashMap(this.size() + 1);
map.putAll(this);
map.put(key, value);
return map.toImmutable();
}
public ImmutableIntDoubleMap newWithoutKey(int key)
{
MutableIntDoubleMap map = new IntDoubleHashMap(this.size());