Help needed with QScintilla lexer keywords

[John W. Eaton]

We currently have a big hard-coded list of "keywords" (actually mostly 
function names) in libgui/src/resource-manager.cc that are used by the 
GUI editor for syntax highlighting.  Instead of the static list, I'd 
like to get the list of keywords from Octave.  That part is easy, but 
when I started looking at how this list is used, I noticed that the 
QsciLexer keywords function can have more than one class of keywords. 
What do the class IDs correspond to?  What should be in set 1, 2, 3, etc.?

jwe