func (c *ConfigWriter) PrintClusterDump(filter ClusterFilter, outputFormat string) error {
	_, clusters, err := c.setupClusterConfigWriter()
	if err != nil {
		return err
	}
	filteredClusters := make(proto.MessageSlice, 0, len(clusters))
	for _, cluster := range clusters {
		if filter.Verify(cluster) {
			filteredClusters = append(filteredClusters, cluster)
		}
	}
	out, err := json.MarshalIndent(filteredClusters, "", "    ")