PlottableProtocol question: Normalization by bin width?

[APN-Pucky]

During implementing the protocol for https://github.com/APN-Pucky/babyyoda I noticed that the protocol is not very specific about dividing a histogram by its volume. YODA histograms usually are $d \sigma / d O$ so that one needs to divide by the bin width on the x axis $O$ to have the right histogram. How would this be done with the PlottableProtocol, especially with variances, since the variance then needs to be divided square of the width (by dimensional arguments or correspondingly since the error must be divided by the bin width too)