def getBookmark(self):
if self._write and self._recordCount==<NUM_LIT:0>:<EOL><INDENT>return None<EOL><DEDENT>rowDict = dict(filepath=os.path.realpath(self._filename),<EOL>currentRow=self._recordCount)<EOL>return json.dumps(rowDict)<EOL>
Gets a bookmark or anchor to the current position.

:returns: an anchor to the current position in the data. Passing this
          anchor to a constructor makes the current position to be the first
          returned record.