static String formatName(String modelName, DownSampling downSampling) {
            if (downSampling == null || downSampling == DownSampling.None) {
                return modelName;
            }
            return modelName + "_" + downSampling.getName();
        }
Format the entity name for BanyanDB

@param modelName    name of the model
@param downSampling not used if it is {@link DownSampling#None}
@return entity (e.g. measure, stream) name
oap-server/server-storage-plugin/storage-banyandb-plugin/src/main/java/org/apache/skywalking/oap/server/storage/plugin/banyandb/MetadataRegistry.java