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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 make_model(self, *args, **kwargs):
 """Assemble a Cytoscape JS network from INDRA Statements. This method assembles a Cytoscape JS network from the set of INDRA Statements added to the assembler. Parameters grouping : bool If True, the nodes with identical incoming and outgoing edges are grouped and the corresponding edges are merged. Returns ------- cyjs_str : str The json serialized Cytoscape JS model. """

        for stmt in self.statements:
            if isinstance(stmt, RegulateActivity):
                self._add_regulate_activity(stmt)
            elif isinstance(stmt, RegulateAmount):
                self._add_regulate_amount(stmt)
            elif isinstance(stmt, Modification):
                self._add_modification(stmt)
            elif isinstance(stmt, SelfModification):
                self._add_selfmodification(stmt)
            elif isinstance(stmt, Gef):
                self._add_gef(stmt)
            elif isinstance(stmt, Gap):
                self._add_gap(stmt)
            elif isinstance(stmt, Complex):
                self._add_complex(stmt)
            else:
                logger.warning('Unhandled statement type: %s' %
                               stmt.__class__.__name__)
        if kwargs.get('grouping'):
            self._group_nodes()
            self._group_edges()
        return self.print_cyjs_graph()