RUBY_FL_WB_PROTECTED 1995 gc.c               return newobj_of(klass, T_DATA, (VALUE)type, (VALUE)1, (VALUE)datap, type->flags & RUBY_FL_WB_PROTECTED);
RUBY_FL_WB_PROTECTED 1131 include/ruby/ruby.h #define RUBY_TYPED_WB_PROTECTED      RUBY_FL_WB_PROTECTED /* THIS FLAG DEPENDS ON Ruby version */
RUBY_FL_WB_PROTECTED 1229 include/ruby/ruby.h #define FL_WB_PROTECTED RUBY_FL_WB_PROTECTED