{"ast_node_type":"other","tokens":[{"end":93,"kind":"keyword","start":0,"text":"self.demand_eqtype_with_origin(&self.pattern_cause(ti,"}]}
        self.demand_eqtype_with_origin(&self.pattern_cause(ti, cause_span), expected, actual)
    ) -> Result<(), Diag<'a>> {
            .map_err(|mut diag| {