LAYERBACKDROP
Layer is a backdrop layer
LAYERREFRESH
LAYERSIMPLE
Layer is a simple refresh layer
LAYERSMART
Layer is a smart refresh layer
LAYERSNAME
LAYERSUPER
LAYERS_BACKFILL
LAYERS_NOBACKFILL
LAYERUPDATING
LAYER_CLIPRECTS_LOST
LMN_REGION
NEWLAYERINFO_CALLED