@Override
    public List<ParamInfo> getParamInfo() {
        return List.of(
                ParamInfo.mandatoryParam(
                        PARAM_NAME_SHARD_ID,
                        "The id of the index shard to inspect."),
                ParamInfo.optionalParam(
                        PARAM_NAME_STREAM_ID,
                        "The id of a specific stream to query for."),
                ParamInfo.optionalParam(PARAM_NAME_LIMIT,
                        "A limit on the number of docs to return")
        );
    }
Provides system information for inspecting index shards.
Gets counts of documents grouped by stream id.
Requires the shardId as a query parameter.
stroom-index/stroom-index-impl/src/main/java/stroom/index/impl/IndexSystemInfo.java