We don't ever call group_ensure() with a non-null group, and
libmeanwhile takes steps to ensure a group never has a NULL name,
so this can't happen. But this makes clang happier.
#error "This is file is not a valid C code"
/* This file contains some of the macros from other header files as
function declarations. This does not make sense in C, but it
provides type information for the dbus-analyze-functions.py
program, which makes these macros callable by DBUS. */