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Oct 31, 2025
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Update changelogs from fern repo #1664

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21 changes: 21 additions & 0 deletions fern/products/sdks/overview/java/changelog/2025-10-31.mdx
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## 3.11.0
**`(feat):`** Add support for three-state nullable fields in PATCH requests via `collapse-optional-nullable` config.
When enabled, optional nullable fields use `OptionalNullable<T>` to distinguish between omitted fields,
explicit null values, and actual values. This enables proper PATCH request semantics for APIs that need
to differentiate between "not specified" and "set to null".

```yaml
customConfig:
collapse-optional-nullable: true
```

Generated usage:
```java
UpdateRequest.builder()
.fieldName(OptionalNullable.absent()) // Omit field
.anotherField(OptionalNullable.ofNull()) // Clear field
.valueField(OptionalNullable.of("value")) // Set value
.build();
```