words = _objectWrappers.wrap(
    _arrays.arrayOf(_plugins.loadClass("java.lang.String"), "hello", "world", "kotlin", "android"))
# 按单词长度分组，并获取每个分组的大小,每个分组的大小: {5=2, 6=1, 7=1}
words.groupingBy(lambda it: _objectWrappers.wrap(it).count()).eachCount().forEach(lambda it: _console.log(it))