code: public static int[] validate1NonNegative(int[] data, String paramName){
          validateNonNegative(data, paramName);
          return validate1(data, paramName);
      }
docs: Reformats the input array to a length 1 array and checks that all values are >= 0.
  
  If the array is length 1, returns the array
  
  @param data An array
  @param paramName The param name, for error reporting
  @return An int array of length 1 that represents the input