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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _ProcessFileEntry(self, mediator, file_entry):
 """Processes a file entry. Args: mediator (ParserMediator):
 mediates the interactions between parsers and other components, such as storage and abort signals. file_entry (dfvfs.FileEntry):
 file entry. """

    display_name = mediator.GetDisplayName()
    logger.debug(
        '[ProcessFileEntry] processing file entry: {0:s}'.format(display_name))

    reference_count = mediator.resolver_context.GetFileObjectReferenceCount(
        file_entry.path_spec)

    try:
      if self._IsMetadataFile(file_entry):
        self._ProcessMetadataFile(mediator, file_entry)

      else:
        file_entry_processed = False
        for data_stream in file_entry.data_streams:
          if self._abort:
            break

          if self._CanSkipDataStream(file_entry, data_stream):
            logger.debug((
                '[ProcessFileEntry] Skipping datastream {0:s} for {1:s}: '
                '{2:s}').format(
                    data_stream.name, file_entry.type_indicator, display_name))
            continue

          self._ProcessFileEntryDataStream(mediator, file_entry, data_stream)

          file_entry_processed = True

        if not file_entry_processed:
          # For when the file entry does not contain a data stream.
          self._ProcessFileEntryDataStream(mediator, file_entry, None)

    finally:
      new_reference_count = (
          mediator.resolver_context.GetFileObjectReferenceCount(
              file_entry.path_spec))
      if reference_count != new_reference_count:
        # Clean up after parsers that do not call close explicitly.
        if mediator.resolver_context.ForceRemoveFileObject(
            file_entry.path_spec):
          logger.warning(
              'File-object not explicitly closed for file: {0:s}'.format(
                  display_name))

    logger.debug(
        '[ProcessFileEntry] done processing file entry: {0:s}'.format(
            display_name))