gripe about/handle undefined methods
gripe about/handle undefined methods

of a QGL2 function calls something that's outside of QGL2,
or not properly declared, then it's an error.

We already know that this is too restrictive, because we want
to be able to call external "QGL1" functions, and we can find
them.

BBN-Q/pyqgl2,BBN-Q/pyqgl2