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fix: type check for on_event_start for llama-index (#1557)

* add new parameter

* black

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Co-authored-by: Mikyo King <mikyo@arize.com>
R
Roger Yang committed
fd709defcc86843662318fb7878be2fc7edd3ea4
Parent: 5b4f6ee
Committed by GitHub <noreply@github.com> on 10/4/2023, 7:38:07 PM