class_docstr: Base API generator class. We derive several subclasses to implement
  the different backends.
class_docstr_tok: ["Base","API","generator","class",".","We","derive","several","subclasses","to","implement","the","different","backends","."]
code: def _add_function(self, des):
      # Need to be overloaded in subclass
      raise NotImplementedError()
  
imports: from __future__ import annotations
  import os
  import sys
  import headerparser
  from annotations import parse_anotations
  from OpenGL import GL
label_desc: Use image node_id 6 for calling the ApiGenerator obj's underlying member method code with example usage: obj._add_function(des) without return types