ExternalContextUtils.getRequestType() doesn't work in a portlet environment

ExternalContextUtils.getRequestType(Object config, Object request) signature doesn't correspond to what's used in TomahawkFacesContextFactory.getFacesContext(): The called method requires a config and a request while it's invoked using a context and a request.
==> This always leads to a ClassCastException at TomahawkFacesContextFactory.getFacesContext()#64.

The invoked method seems to have to be fixed something like this:
class ExternalContextUtils:
public static final RequestType getRequestType(Object context, Object request) {
if(_PORTLET_CONTEXT_CLASS != null)
{
if (_PORTLET_CONTEXT_CLASS.isInstance(context))
{
// blablabla
}