fetch_UCSC_track_data   Fetch UCSC track data
get_UCSC_chrom_sizes    List UCSC chromosome sizes
list_UCSC_genomes       List UCSC genomes
list_UCSC_tracks        List UCSC tracks and associated primary tables
UCSC_dbselect           Conveniently retrieve data from the UCSC
                        MariaDB server
UCSC.api.url            Get or set the default UCSC API URL
