newchunks = plated_chunks.remove_underscorechunks(chunks)
Remove any chunks that begin with "_" these are all internal chunks used by plated code. The user should not be creating any chunks whose names begin with an underscore. Also none of these chunks should ever bubble down through the heir achy, they belong only to the page in which they are created..
A new object full of only chunks that do not begin with an underscore is returned.