is there a way to load the RTE javascript in a module for the cpanel?

I have tried the following, but keep getting an error when refreshing the page:

    ee()->load->library(array('javascript', 'rte_lib'));

    ee()->javascript->output(
      ee()->rte_lib->build_js(0, '.WysiHat-field', NULL, TRUE)
    );


error:
`Unable to load the requested class: rte_lib`

any ideas?

thanks in advance.