{"ast_node_type":"function","tokens":[{"end":64,"kind":"keyword","start":0,"text":"fn"}]}
    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
impl<'a, Cx: PatCx> fmt::Debug for PlaceCtxt<'a, Cx> {
        fmt.debug_struct("PlaceCtxt").field("ty", self.ty).finish()