ZSTD_rmd_refMultipleDDicts
if (dctx->refMultipleDDicts == ZSTD_rmd_refMultipleDDicts) {
bounds.upperBound = (int)ZSTD_rmd_refMultipleDDicts;
if (dctx->refMultipleDDicts == ZSTD_rmd_refMultipleDDicts && dctx->ddictSet) {