Imported declaration warning in Xcode 11

Question

When I run my code, Xcode 11 shows some warnings, like:

<unknown>:0: warning: imported declaration 'UITableViewDiffableDataSourceCellProvider' could not be mapped to 'UITableViewDiffableDataSourceReference.CellProvider'
<unknown>:0: warning: imported declaration 'UICollectionViewDiffableDataSourceCellProvider' could not be mapped to 'UICollectionViewDiffableDataSourceReference.CellProvider'.

How can I solve these warnings?

I run my code in Xcode 11, and It runs well in Xcode 10.

No code. If you want, I can show what you want.

I want to solve these warnings.

Answer 1

Go to: Preferences > location > commandLine tools [drop down] Select: Latest version of Xcode 11.0 (...)

Answer 2

Clean your build folder and rebuild.