'Returns list of CSS files that this XBlock depends on.
The helper function that it uses to obtain the list of CSS files
works in conjunction with the Django pipeline to ensure that in development mode
the files are loaded individually, but in production just the single bundle is loaded.'

@staticmethod
def css_dependencies():

    if get_language_bidi():
        return get_css_dependencies('style-inline-discussion-rtl')
    else:
        return get_css_dependencies('style-inline-discussion')
