This PR was merged into the 6.0 branch.Discussion----------Add back ``@return` $this` annotations| Q             | A| ------------- | ---| Branch?       | 6.0| Bug fix?      | no| New feature?  | no| Deprecations? | no| Tickets       | -| License       | MIT| Doc PR        | -In#42213 I removed those annotations and tried to convinced myself and others that we could do so without loosing too much.I was about to send a PR to remove all remaining similar annotations. When I reviewed the patch I created for that, I stopped on `ItemInterface::tag()` (which is just an example):https://github.com/symfony/symfony/blob/444d43fa11990092c53ba54849bb1df36225adcf/src/Symfony/Contracts/Cache/ItemInterface.php#L52-L57If we remove that annotation on the interface, all implementations will have to deal with the return value of the call to `tag()`. Whereas with ``@return` $this`, the contracts are clear: no need to, implementations are expected to mutate and return the current object. I don't think this would be appropriate in this example./cc `@nikic` as this might be some nice food for thoughts to consider adding `$this` as a possible native return type.Commits-------7fafe83 Add back ``@return` $this` annotations