docs: public static boolean isScalar(INDArray indexOver, INDArrayIndex... indexes) {
          boolean allOneLength = true;
          for (int i = 0; i < indexes.length; i++) {
              allOneLength = allOneLength && indexes[i].length() == 1;
          }
  
          int numNewAxes = NDArrayIndex.numNewAxis(indexes);
          if (allOneLength && numNewAxes == 0 && indexes.length == indexOver.rank())
              return true;
          else if (allOneLength && indexes.length == indexOver.rank() - numNewAxes) {
              return allOneLength;
          }
  
          return allOneLength;
      }