public SDVariable arg ( int num ) { SDVariable [ ] args = args ( ) ; Preconditions . checkNotNull ( args , "Arguments are null for function %s" , this . getOwnName ( ) ) ; Preconditions . checkArgument ( num >= 0 && num < args . length , "Invalid index: must be 0 to numArgs (0 <= idx < %s)" , args . length ) ; return args [ num ] ; }
Return the specified argument for this function