This class describes a pass of a subshader.
| IsGrabPass | Indicates whether this Pass results from a GrabPass command. | 
| Name | The name of this pass (may be empty). | 
| SourceCode | The source code for this pass. | 
| CompileVariant | Compiles a shader variant for this shader pass and returns its bytecode and resource layout. | 
| FindTagValue | Searches for the tag specified by tagName on this SubShader and returns the value of the tag. | 
| HasShaderStage | Checks whether this pass includes a shader stage. | 
| PreprocessVariant | Preprocesses a shader variant for this shader pass and returns the preprocessed code. |