RUBY_FL_FREEZE   1236 include/ruby/ruby.h #define FL_FREEZE       RUBY_FL_FREEZE
RUBY_FL_FREEZE   1290 include/ruby/ruby.h #define RB_OBJ_FROZEN_RAW(x) (RBASIC(x)->flags&RUBY_FL_FREEZE)
RUBY_FL_FREEZE   1292 include/ruby/ruby.h #define RB_OBJ_FREEZE_RAW(x) (void)(RBASIC(x)->flags |= RUBY_FL_FREEZE)