Steps to reproduce

1. look at the source code of Frozen, setRows().

actual result

It's not implemented inside.

expected result

remove the methods to avoid confusing users. Then if someone specifies "rows", an exception will be thrown.

extra information

I already remove the "rows" attribute from the document about Frozen, http://books.zkoss.org/wiki/ZK%20Component%20Reference/Supplementary/Frozen