def _is_meta(fn):
if "<STR_LIT:.>" not in fn:<EOL><INDENT>return False<EOL><DEDENT>return fn.rsplit("<STR_LIT:.>")[-<NUM_LIT:1>].lower() in decoders.SUPPORTED_FILES<EOL>
Return ``True``, if the `fn` argument looks (has right suffix) like it can
be meta.