This class describes a shader.
| ActiveSubshader | Returns the active subshader or null if none is currently active. |
| ActiveSubshaderIndex | Returns the index of the active subshader or -1 if none is currently active. |
| SerializedSubshaderCount | The number of serialized subshaders used by this shader. |
| SourceShader | The shader attached to this data set. |
| SubshaderCount | The number of runtime subshaders used by this shader. |
| GetSerializedSubshader | Obtains the serialized subshader at the given index. |
| GetSubshader | Obtains the runtime subshader at the given index. |