BuildTargetGroup is marked for deprecation in the future. Use PlayerSettings.GetIcons instead.
Unity enables you to specify multiple icon textures for each platform.
Each texture in the returned array corresponds to an entry in the list of icon sizes returned by GetIconSizesForTargetGroup. By default, [[GetIcons(NamedBuildTarget,IconKind)]] returns all icons for a platform unless you specify an IconKind value. Only iOS supports icons which have a different kind than IconKind.Application.