{"ast_node_type":"other","tokens":[{"end":38,"kind":"keyword","start":0,"text":"type"}]}
    type Output = char::EscapeUnicode;
impl FnOnce<(char, )> for CharEscapeUnicode {
    #[inline] extern "rust-call" fn call_once(self , (c, ): (char, )) -> char::EscapeUnicode {