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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 get_router_options(self, datacenter=None, flavor=None):
 """Returns available backend routers for the dedicated host."""

        package = self._get_package()

        location = self._get_location(package['regions'], datacenter)
        item = self._get_item(package, flavor)

        return self._get_backend_router(location['location']['locationPackageDetails'], item)