UDX arguments

You can use the following argument types in your UDX code:

StringArg* stringArg(int n)
float floatArg(int n)
double doubleArg(int n)
int argType(int n)
int numArgs()
int stringArgSize(int n)
int64 int64Arg(int n)
int32 int32Arg(int n)
int16 int16Arg(int n)
bool isArgNull(int n)

bool boolArg(int n)