{"ast_node_type":"other","tokens":[{"end":99,"kind":"keyword","start":0,"text":"TermVid::Const(self.inner.borrow_mut().const_unification_table().find(ct_vid).vid),"}]}
                TermVid::Const(self.inner.borrow_mut().const_unification_table().find(ct_vid).vid),
                self.probe_const_var(ct_vid).unwrap_err(),
            ),