rb_enumeratorize_with_size  408 enumerator.c   rb_enumeratorize_with_size(VALUE obj, VALUE meth, int argc, const VALUE *argv, rb_enumerator_size_func *size_fn)
rb_enumeratorize_with_size  230 include/ruby/intern.h #define rb_enumeratorize_with_size(obj, id, argc, argv, size_fn) \