fix: CometAPIChatGenerator - handle delta set to None
#2759
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Related Issues
Twin PR of deepset-ai/haystack#10397
Proposed Changes:
deltaset toNoneduring streamingHow did you test it?
Unfortunately cannot reproduce the issue now.
Tested in Haystack, so I am not adding tests here.
Notes for the reviewer
I'll create an issue to remove this monkey patch after Haystack 2.23.0. -> #2760
Checklist
fix:,feat:,build:,chore:,ci:,docs:,style:,refactor:,perf:,test:.