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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 second_textx_model(self, model_parser):
 """Cross reference resolving for parser model."""


        if self.grammar_parser.debug:
            self.grammar_parser.dprint("RESOLVING MODEL PARSER: second_pass")

        self._resolve_rule_refs(self.grammar_parser, model_parser)
        self._determine_rule_types(model_parser.metamodel)
        self._resolve_cls_refs(self.grammar_parser, model_parser)

        return model_parser