error[E0117]: only traits defined in the current crate can be implemented for arbitrary types
  --> /home/meh/devel/rust/gstreamer-rs/gstreamer-rtsp-server/src/r_t_s_p_token.rs:44:1
   |
44 | / impl Default for GstRc<RTSPTokenRef> {
45 | |     fn default() -> Self {
46 | |         Self::new()
47 | |     }
48 | | }
   | |_^ impl doesn't use types inside crate
   |
   = note: the impl does not reference any types defined in this crate
   = note: define and implement a trait or new type instead