public static Authorizations toAuthorizations(ClientProtos.Authorizations proto) {
    if (proto == null) return null;
    return new Authorizations(proto.getLabelList());
  }
Convert a protocol buffer Authorizations to a client Authorizations
@return the converted client Authorizations
hbase-client/src/main/java/org/apache/hadoop/hbase/shaded/protobuf/ProtobufUtil.java