def contains(self, chrom, point):
filename = self._chromToFilename(chrom)<EOL>if filename is None:<EOL><INDENT>return False<EOL><DEDENT>if self.currentlyLoaded != filename:<EOL><INDENT>self._loadFile(filename)<EOL><DEDENT>return self.currentlyLoaded.contains(chrom, point)<EOL>
@summary: return True if this WigDir has an element covering the
          given position, False otherwise