rb_hash_has_key  4322 hash.c             rb_define_method(rb_cHash,"include?", rb_hash_has_key, 1);
rb_hash_has_key  4323 hash.c             rb_define_method(rb_cHash,"member?", rb_hash_has_key, 1);
rb_hash_has_key  4324 hash.c             rb_define_method(rb_cHash,"has_key?", rb_hash_has_key, 1);
rb_hash_has_key  4326 hash.c             rb_define_method(rb_cHash,"key?", rb_hash_has_key, 1);