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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 monitored_resource_descriptor_path(cls, project, monitored_resource_descriptor):
 """Return a fully-qualified monitored_resource_descriptor string."""

        return google.api_core.path_template.expand(
            "projects/{project}/monitoredResourceDescriptors/{monitored_resource_descriptor}",
            project=project,
            monitored_resource_descriptor=monitored_resource_descriptor,
        )