1. HIPPO::ensg_hgnc
    A reference data frame that matches ENSG IDs to HGNC symbols
    csv| xlsx| json| ndjson| rda| rds
    data.frame|46606 x 2
  2. HIPPO::toydata
    A sample single cell sequencing data subsetted from Zheng2017
    rda| rds
    SingleCellExperiment