Reads a list of file names/relative paths from a UTF-8 file.
One file name/relative path per line. This path is used for the fetch key,
the id and the emit key. If you need more customized control of the keys/ids,
consider using the jdbc pipes iterator or the csv pipes iterator.
Skips empty lines and lines starting with '#'
Fields inherited from class org.apache.tika.pipes.pipesiterator.PipesIterator