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spring-framework/spring-web
Brian Clozel a4b3111928 Make HttpEntity headers mutables
Since its inception, instantiating an `HttpEntity` makes its
`HttpHeaders` read-only. While immutability is an interesting design
principle, here we shouldn't enforce this.

For example, developers can expect to instantiate a `ResponseEntity`
and still mutate its headers.

Closes gh-35888
2025-11-27 16:37:47 +01:00
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2025-11-27 16:37:47 +01:00