public <B> ISeq<B>
	map(final Function<? super FlatTreeNode<V>, ? extends B> mapper) {
		return stream()
			.map(mapper)
			.collect(ISeq.toISeq());
	}
Return a sequence of all <em>mapped</em> nodes of the whole underlying
tree. This is a convenient method for
{@snippet lang="java":
final ISeq<B> seq = stream()
    .map(mapper)
    .collect(ISeq.toISeq());
}

@param mapper the mapper function
@param <B> the mapped type
@return a sequence of all <em>mapped</em> nodes
jenetics.ext/src/main/java/io/jenetics/ext/util/FlatTreeNode.java