rb_cvar_defined  1977 eval.c         	if (rb_cvar_defined(cvar_cbase(), node->nd_vid)) {
rb_cvar_defined   50 ext/digest/digest.c     if (rb_cvar_defined(klass, id_metadata) == Qfalse) {
rb_cvar_defined  1639 variable.c         if (rb_cvar_defined(mod, id)) {