@load<EOL><INDENT>def exists(self, index):<DEDENT>
data = self.data<EOL>try:<EOL><INDENT>for c in self._split(index):<EOL><INDENT>i = int(c) - <NUM_LIT:1><EOL>data = data[i][<NUM_LIT:4>]<EOL><DEDENT><DEDENT>except Exception:<EOL><INDENT>return False<EOL><DEDENT>return True<EOL>
Checks whether :index: exists in the Model.

        :index: Index to look for.
        :returns: True if :index: exists in the Model, False otherwise.