The "keyframes" of a slice.
@:optionaloptionalpivot:Null<AtlasPos>
The pivot point of this slice
frame:Int
The frame that the slice changes properties
@:optionaloptionaldata:Null<String>
A message attached to this object
@:optionaloptionalcolor:Null<AseAtlasColor>
The color used to display this object
@:optionaloptionalcenter:Null<AtlasRect>
The center rect of the 9-slice of this slice, if 9-slice is enabled
bounds:AtlasRect
The size and postion of the slice at this frame