The AzimuthData class is used to store reference info needed for Azimuth
plotrefDimReduc object containing UMAP for plotting and projection. This should also contain the cell IDs in the misc slot
colormapVector of id-color mapping for specifying the plots.
seurat.versionVersion of Seurat used in reference construction
azimuth.versionVersion of Azimuth used in reference construction
reference.versionVersion of the Azimuth reference