BalancedTree allows key-value mapping with arbitrary keys, as long as they
can be ordered. By default, Reflect.compare is used in the compare
method, which can be overridden in subclasses.
Operations have a logarithmic average and worst-case cost.
Iteration over keys and values, using keys and iterator respectively,
are in-order.
Constructor
Methods
Tells if key is bound to a value.
This method returns true even if key is bound to null.
If key is null, the result is unspecified.
Returns the value key is bound to.
If key is not bound to any value, null is returned.
If key is null, the result is unspecified.