## Not run: 
#   ## open UCSC genome browser:
#   browseGenome()
#   ## to view a specific range:
#   range <- GRangesForUCSCGenome("hg18", "chr22", IRanges(20000, 50000))
#   browseGenome(range = range)
#   ## a slightly larger range:
#   browseGenome(range = range, end = 75000)
#   ## with a track:
#   track <- import(system.file("tests", "v1.gff", package = "rtracklayer"))
#   browseGenome(GRangesList(track))
#   ## End(Not run)
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