When the sort direction is ascending, the data range is sorted with the cells in the custom list appearing first, in the order they appear in the list, followed by the other cells in the same relative order they had to each other before the sort. When the sort direction is descending, the cells not in the list will appear first in the data region and they will appear in the same relative order they had before the sort. They will be followed by the other cells in the reverse order of the list.
Target Platforms: Android 4.4+, iOS 8+
Development Environments: Visual Studio 2015+, Visual Studio for Mac Preview, Xamarin for Visual Studio 4.2+