{"ast_node_type":"other","tokens":[{"end":93,"kind":"keyword","start":0,"text":"ConstraintCategory::CallArgument(Some(self.infcx.tcx.erase_regions(func_ty)))"}]}
                ConstraintCategory::CallArgument(Some(self.infcx.tcx.erase_regions(func_ty)))
            let category = if call_source.from_hir_call() {
            } else {