{"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"Ok(TyKind::Alias(chalk_ir::AliasTy::Projection(ProjectionTy"}]}
                Ok(TyKind::Alias(chalk_ir::AliasTy::Projection(ProjectionTy {
                // this kind of associated types.
                    associated_ty_id: *id,