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dmytrorykun
34748be60d
## Summary This PR makes some fixes to the `fastAddProperties` function: - Use `if (!attributeConfig)` instead of `if (attributeConfig === undefined)` to account for `null`. - If a prop has an Object `attributeConfig` with a `diff` function defined on it, treat it as an atomic value to keep the semantics of `diffProperties`. ## How did you test this change? Build and run RNTester app. DiffTrain build for commit https://github.com/facebook/react/commit/b37e4b4e616d6d66c1cde9c0a4c2cbd866b0b582.