public Stream<TreeMatchResult<V>> results() {
		return _tree.stream()
			.flatMap(tree -> _pattern.match(tree).stream());
	}
Return all matching <em>sub</em>-trees.

@return all matching subtrees
@throws NullPointerException if the given predicate is {@code null}
jenetics.ext/src/main/java/io/jenetics/ext/rewriting/TreeMatcher.java