rb_gvar_val_getter 1686 include/ruby/ruby.h VALUE rb_gvar_val_getter(ID id, void *data, struct rb_global_variable *gvar);
rb_gvar_val_getter  516 variable.c         var->getter = rb_gvar_val_getter;
rb_gvar_val_getter  649 variable.c         if (!getter) getter = rb_gvar_val_getter;