tree 38e2fa46b919c592d4bc0a925e8164a925f3e0af
parent f359d9e27a5e53324173d6b7dbcab3b696d6bedd
author Kate Lovett <katelovett@google.com> 1690413665 -0500
committer GitHub <noreply@github.com> 1690413665 +0000
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Minor adjustments on 2D APIs (#131358)

These tweaks came from https://github.com/flutter/packages/pull/4536

- The TwoDimensionalChildBuilderDelegate asserts that maxXIndex and maxYIndex are null or >= 0
- The TwoDimensionalChildDelegate setter in RenderTwoDimensionalViewport has a covariant to allow type safety for subclasses of RenderTwoDimensionalViewport implementing with other subclasses of TwoDimensionalChildDelegate

I'd like to cherry pick this so https://github.com/flutter/packages/pull/4536 will not have to wait for it to reach stable.