This will check a file on disk to see if it is in Fiji's simple neurite tracer XML format.
is.fijitraces(f, bytes = NULL)
path to a file on disk
optional raw vector of bytes used for prechecks
Some prechecks (optionally taking place on a supplied raw vector of bytes) should weed out nearly all true negatives and identify many true positives without having to read/parse the file header.