env_keys         2103 hash.c             keys = env_keys();	/* rb_secure(4); */
env_keys         2180 hash.c             keys = env_keys();	/* rb_secure(4); */
env_keys         2249 hash.c             keys = env_keys();	/* rb_secure(4); */
env_keys         2531 hash.c             keys = env_keys();	/* rb_secure(4); */
env_keys         2686 hash.c             rb_define_singleton_method(envtbl,"keys", env_keys, 0);