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Gets the collection of MapSlice specifying how the map is partitioned for virtualization.
public ICollection<MapSlice> Slices { get; }
Each MapSlice defines a set of regions this C1MapVirtualLayer will get items for when needed. The minimum zoom of a MapSlice is the value of its Zoom property, while the maximum zoom is the value from the Zoom property of the next slice. Each slice divides the map in a uniform grid of regions according to the current Projection.