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[Home](./index.md) &gt; [@contract-case/case-definition-dsl](./case-definition-dsl.md) &gt; [matchers](./case-definition-dsl.matchers.md) &gt; [strings](./case-definition-dsl.matchers.strings.md) &gt; [StringContaining](./case-definition-dsl.matchers.strings.stringcontaining.md) &gt; [toJSON](./case-definition-dsl.matchers.strings.stringcontaining.tojson.md)

## matchers.strings.StringContaining.toJSON() method

For non-TypeScript implementations (see `AnyMatcher.toJSON`<!-- -->)

**Signature:**

```typescript
toJSON(): unknown;
```

**Returns:**

unknown