[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [Type](https://evolu.dev/docs/api-reference/common/Type) › NullTypeInMembers

```ts
type NullTypeInMembers<Members> = Members extends [infer Head, ...infer Tail]
  ? Head extends typeof Null
    ? true
    : Tail extends [AnyType, ...AnyType[]]
      ? NullTypeInMembers<Tail>
      : false
  : false;
```

Defined in: [packages/common/src/Type.ts:4456](https://github.com/evoluhq/evolu/blob/e7144e2bbe9069362b62dec1b64a8aa922b8f1b0/packages/common/src/Type.ts#L4456)