Modified from https://github.com/joey711/phyloseq/blob/master/R/allClasses.R Use setClassUnion to define the unholy NULL-data union as a virtual class. This is a way of dealing with the expected scenarios in which one or more of the component data classes is not available, in which case NULL will be used instead.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.