Allow Animation EndResult callback to return Promise#25793

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draperunner wants to merge 2 commits intofacebook:masterfrom draperunner:more-permissive-endcallback-type

+2-2

Commits on Jul 23, 2019

Allow Animation EndResult callback to return any
draperunner
committed

Commits on Jul 25, 2019

Use void | Promise<void>, not any, to emphasize meaningless return value
draperunner
committed