{"ast_node_type":"function","tokens":[{"end":95,"kind":"keyword","start":0,"text":"fn"}]}
    fn to_self_profile_string(&self, builder: &mut QueryKeyStringBuilder<'_, '_>) -> StringId {
impl<T: SpecIntoSelfProfilingString> IntoSelfProfilingString for T {
        self.spec_to_self_profile_string(builder)