streamsupport-cfuture-1.5.5-sources.jar

<dependency>
	<groupId>net.sourceforge.streamsupport</groupId>
	<artifactId>streamsupport-cfuture</artifactId>
	<version>1.5.5</version>
	<classifier>sources</classifier>
	<type>java-source</type>
</dependency>

net.sourceforge.streamsupport:streamsupport-cfuture:1.5.5

java8/util/concurrent/CompletableFuture.java
java8/util/concurrent/CompletionStage.java