nd4j-backends/nd4j-api-parent/nd4j-api/src/main/java/org/nd4j/autodiff/samediff/SameDiffOpExecutioner.java
@Override
    public INDArray exec(Variance accumulation, boolean biasCorrected, int... dimension) {
        return processOp(accumulation).z();
    }
@Override
    public INDArray exec(Variance accumulation, boolean biasCorrected, int... dimension) {
        return processOp(accumulation).z();
    }
Execute an accumulation along one or more dimensions

@param accumulation  the accumulation
@param biasCorrected
@param dimension     the dimension  @return the accmulation op