presto-main/src/main/java/io/prestosql/operator/scalar/MultimapFromEntriesFunction.java/MultimapFromEntriesFunction/clearEntryIndices
class MultimapFromEntriesFunction:    private void clearEntryIndices(int entryCount)
    {
        verify(entryCount <= entryIndicesList.length);
        for (int i = 0; i < entryCount; i++) {
            entryIndicesList[i].clear();
        }
    }