# get functions from namespace instead of possibly getting
# implementations shipped with recent R versions:
bp_file.size = getFromNamespace("file.size", "backports")
bp_file.mode = getFromNamespace("file.size", "backports")
bp_file.mtime = getFromNamespace("file.size", "backports")
fn = file.path(R.home(), "COPYING")
bp_file.size(fn)
bp_file.mode(fn)
bp_file.size(fn)
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