bool ComputeIslandsByRegionMerging ( [FDynamicMesh3](API\Runtime\GeometryCore\DynamicMesh\FDynamicMesh3) & TargetMesh, [FDynamicMeshUVOverlay](API\Runtime\GeometryCore\DynamicMesh\FDynamicMeshUVOverlay) & TargetUVOverlay, const [FMeshConnectedComponents](API\Runtime\GeometryCore\Selections\FMeshConnectedComponents) & InitialComponents, [TArray](API\Runtime\Core\Containers\TArray)< [TArray](API\Runtime\Core\Containers\TArray)< int32 >> & IslandsOut, [FProgressCancel](API\Runtime\GeometryCore\Util\FProgressCancel) * Progress )