RUBY_FL_USER4     916 include/ruby/ruby.h RMODULE_INCLUDED_INTO_REFINEMENT = RUBY_FL_USER4,
RUBY_FL_USER4     938 include/ruby/ruby.h RSTRING_EMBED_LEN_MASK = (RUBY_FL_USER2|RUBY_FL_USER3|RUBY_FL_USER4|
RUBY_FL_USER4     989 include/ruby/ruby.h RARRAY_EMBED_LEN_MASK = (RUBY_FL_USER4|RUBY_FL_USER3),