{"ast_node_type":"function","tokens":[{"end":94,"kind":"keyword","start":0,"text":"#[inline]"}]}
    #[inline] extern "rust-call" fn call_once(self , (c, ): (char, )) -> char::EscapeUnicode {
    type Output = char::EscapeUnicode;
        Fn::call(&self , (c, ))