HEADER-DERRIVED.txt

Original work: copyright 2009-2015 Lukáš Křečan
(https://github.com/lukas-krecan/completion-stage/blob/completion-stage-0.0.9/src/main/java/net/javacrumbs/completionstage/CallbackRegistry.java)

This class is based on the work create by Lukáš Křečan 
under the Apache License, Version 2.0. Please see 
https://github.com/lukas-krecan/completion-stage

Modified work: copyright 2015-2020 Valery Silaev (http://vsilaev.com)

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.