OptionalcategoryIf set, denotes the category of the function.
OptionalcustomIf set, a custom friendly name must be implemented.
The description of the function.
OptionalfriendlyThe optional display name of the function.
The function input parameters.
The symbol name of the function.
The function output parameter.
The HLSLBuiltInFunction represents a built-in function in HLSL that will be converted to a node.