The SymbolLayerType can be one of:
| Constant | Description | 
|---|---|
Enums. | (-1) An unknown value. This value typically indicates an error has occurred. | 
Enums. | (0) The base symbol layer type. | 
Enums. | (1) Marker symbol layer. | 
Enums. | (2) Vector marker symbol layer. | 
Enums. | (3) Stroke symbol layer. | 
Enums. | (4) Solid stroke symbol layer. | 
Enums. | (5) Picture marker symbol layer. | 
Enums. | (6) Fill symbol layer. | 
Enums. | (7) Solid fill symbol layer. | 
Enums. | (8) Picture fill symbol layer. | 
Enums. | (9) Hatch fill symbol layer. |