def get_nrt_api(self, builder):
        """Calls NRT_get_api(), which returns the NRT API function table.
        """
        self._require_nrt()

        fnty = ir.FunctionType(cgutils.voidptr_t, ())
        mod = builder.module
        fn = cgutils.get_or_insert_function(mod, fnty, "NRT_get_api")
        return builder.call(fn, ())
Calls NRT_get_api(), which returns the NRT API function table.
        
numba/core/runtime/context.py