rb_hash_foreach  475 hash.c             rb_hash_foreach(hash, delete_if_i, 0);
rb_hash_foreach  522 hash.c         	rb_hash_foreach(hash, select_i, result);
rb_hash_foreach  621 hash.c             rb_hash_foreach(hash, each_value_i, 0);
rb_hash_foreach  638 hash.c             rb_hash_foreach(hash, each_key_i, 0);
rb_hash_foreach  655 hash.c             rb_hash_foreach(hash, each_pair_i, 0);