@Override
  public GetNamespaceDescriptorResponse getNamespaceDescriptor(RpcController controller,
    GetNamespaceDescriptorRequest request) throws ServiceException {
    try {
      return GetNamespaceDescriptorResponse.newBuilder()
        .setNamespaceDescriptor(
          ProtobufUtil.toProtoNamespaceDescriptor(server.getNamespace(request.getNamespaceName())))
        .build();
    } catch (IOException e) {
      throw new ServiceException(e);
    }
  }
List the currently available/stored snapshots. Any in-progress snapshots are ignored
hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterRpcServices.java