def add_runtime_library_dir (self, dir):
        self.runtime_library_dirs.append (dir)
See if this class needs registering of fields
dataset/ETHPy150Open babble/babble/include/jython/Lib/distutils/ccompiler.py/CCompiler.add_runtime_library_dir--crossover with--dataset/ETHPy150Open callowayproject/django-categories/categories/apps.py/handle_class_prepared