code: public SDVariable batchNorm(SDVariable input, SDVariable mean,
                                  SDVariable variance, SDVariable gamma,
                                  SDVariable beta, double epsilon, int... axis) {
          return batchNorm(null, input, mean, variance, gamma, beta, true, true, epsilon, axis);
      }
docs: Batch norm operation.
  
  @see #batchNorm(String, SDVariable, SDVariable, SDVariable, SDVariable, SDVariable, double, int...)