@type t() :: %Milvex.Milvus.Proto.Milvus.GetIndexStatisticsRequest{
  __unknown_fields__: [Protobuf.unknown_field()],
  base: Milvex.Milvus.Proto.Common.MsgBase.t() | nil,
  collection_name: String.t(),
  db_name: String.t(),
  index_name: String.t(),
  timestamp: non_neg_integer()
}