True if the layer in front of this layer is being used as a track matte on this layer. When true, this layer’s track -MatteType value controls how the matte
True if this layer is being used as a track matte for the layer behind it.Boolean; read-only.
If this layer has a track matte, specifies the way the track matte is applied.A TrackMatteType enumerated value; read/write. One of:TrackMatteType.ALPHATrac