An integer corresponding to an option for how column headers are to be processed

• 0: NO_HEADERS No column headers are read

• 1: ONLY_FIRST_FILE_HAS_HEADERS Read headers only from first row of first file, everything else is data.

• 2: COMBINE_ALL_FILES_HEADERS Read headers from first row of each file, combining identically named columns.

• 3: ALL_FILES_HAVE_SAME_HEADERS Read headers from first row of first file, drops first row from other files.