BatchNormOptions

//Create a BatchNormOptions object with the default parameters
auto opts = new BatchNormOptions()
           .gammaInit(constantInit(1.0f))
           .betaInit(constantInit(0.0f))
           .gammaProj(null)
           .betaProj(null)
           .gammaDecay(0.0f)
           .momentum(0.9f);

//Options can also be read back again later
assert(opts.gammaDecay == 0.0f);
assert(opts.momentum == 0.9f);