rb_hash_has_key  1589 hash.c             if (rb_hash_has_key(hash, key)) {
rb_hash_has_key  2645 hash.c             rb_define_method(rb_cHash,"include?", rb_hash_has_key, 1);
rb_hash_has_key  2646 hash.c             rb_define_method(rb_cHash,"member?", rb_hash_has_key, 1);
rb_hash_has_key  2647 hash.c             rb_define_method(rb_cHash,"has_key?", rb_hash_has_key, 1);
rb_hash_has_key  2649 hash.c             rb_define_method(rb_cHash,"key?", rb_hash_has_key, 1);