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This file is part of Logtalk <https://logtalk.org/>  
Copyright 1998-2018 Paulo Moura <pmoura@logtalk.org>

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
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To load all entities in this library load the `optional_loader.lgt` utility
file:

	| ?- logtalk_load(library(optional_loader)).

This library provides an implementation of optional terms with an API modeled
after the Java 8 `Optional` class (mainly due to this library being requested
by users working in Logtalk/Java hybrid applications).
