iteration-composition.xml Iteration, composition list-utilities.xml List utilities stream-tools.xml Streams (lazy lists) variadic-reporters.xml Variadic reporters httpBlocks.xml Web services access (https) word-sentence.xml Words, sentences cases.xml Multi-branched conditional (switch) leap-library.xml LEAP Motion controller setrgb.xml Set RGB or HSV pen color penTrails.xml Save and restore pictures drawn by pen try-catch.xml Catch errors in a script