# Batch

**Kind:** Type

**Source:** [`packages/microservices/external/kafka.interface.ts`](https://github.com/nestjs/nest/blob/master/packages/microservices/external/kafka.interface.ts#L887)

**Part of:** [Microservices](subsystem-packages-microservices)

## Definition

```ts
{ topic: string; partition: number; highWatermark: string; messages: KafkaMessage[]; isEmpty(): boolean; firstOffset(): string | null; lastOffset(): string; offsetLag(): string; offsetLagLow(): string; }
```