Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/36237
This changes the data parameter type for `getItemLayout` from a mutable array (too lenient, even before), to `ArrayLike`, which is now the most constrained subset of data which may be passed to a FlatList.
We could do something more exact by adding another generic parameter to FlatList, but that would be likely be noticeably more breaking, since during testing I couldn't manage a pattern that both kept the same minimum number of generic arguments while keeping inference working.
Changelog:
[General][Breaking] - Constrain data type in `getItemLayout` callback
Reviewed By: javache
Differential Revision: D43466967
fbshipit-source-id: 7a1ce717e7d5cc96a58b8d3ad9def6cf6250871f
Nick Gerleman
febf6b7f33