Describes an argument for a function. If idx is not set then this
descriptor applies to all arguments.
Since we only care about functions as arguments, for now, it is basically a FunctionDescriptor.
If the argument is not a function, do not specify a descriptor for it!
Describes an argument for a function. If
idxis not set then this descriptor applies to all arguments.Since we only care about functions as arguments, for now, it is basically a FunctionDescriptor. If the argument is not a function, do not specify a descriptor for it!