Normalize a reference-genome argument to a BSgenome object
Source:R/genome_utils.R
normalize_genome_arg.RdAccepts either a BSgenome object directly, or one of the string
identifiers "GRCh37" / "hg19" / "BSgenome.Hsapiens.1000genomes.hs37d5",
"GRCh38" / "hg38" / "BSgenome.Hsapiens.UCSC.hg38", or
"GRCm38" / "mm10" / "BSgenome.Mmusculus.UCSC.mm10". The relevant
BSgenome package must be installed; an informative error is raised if not.