{"ast_node_type":"other","tokens":[{"end":98,"kind":"keyword","start":0,"text":"variant_fields.field(name).ok_or(MirLowerError::UnresolvedField)?;"}]}
                                variant_fields.field(name).ok_or(MirLowerError::UnresolvedField)?;
                            let field_id =
                            let Some((op, c)) = self.lower_expr_to_some_operand(*expr, current)?