def query_package_metrics(self, package_id_query, feed_id, project=None):
        """QueryPackageMetrics.
        [Preview API]
        :param :class:`<PackageMetricsQuery> <azure.devops.v5_1.feed.models.PackageMetricsQuery>` package_id_query:
        :param str feed_id:
        :param str project: Project ID or project name
        :rtype: [PackageMetrics]
        """
        route_values = {}
        if project is not None:
            route_values['project'] = self._serialize.url('project', project, 'str')
        if feed_id is not None:
            route_values['feedId'] = self._serialize.url('feed_id', feed_id, 'str')
        content = self._serialize.body(package_id_query, 'PackageMetricsQuery')
        response = self._send(http_method='POST',
                              location_id='bddc9b3c-8a59-4a9f-9b40-ee1dcaa2cc0d',
                              version='5.1-preview.1',
                              route_values=route_values,
                              content=content)
        return self._deserialize('[PackageMetrics]', self._unwrap_collection(response))
QueryPackageMetrics.
        [Preview API]
        :param :class:`<PackageMetricsQuery> <azure.devops.v5_1.feed.models.PackageMetricsQuery>` package_id_query:
        :param str feed_id:
        :param str project: Project ID or project name
        :rtype: [PackageMetrics]