presto-main/src/main/java/io/prestosql/operator/StaticLookupSourceProvider.java/StaticLookupSourceProvider/StaticLookupSourceProvider
class StaticLookupSourceProvider:    public StaticLookupSourceProvider(LookupSource lookupSource)
    {
        this.lookupSource = requireNonNull(lookupSource, "lookupSource is null");
    }