presto-main/src/main/java/io/prestosql/type/DecimalOperators.java/DecimalOperators/addLongLongLong
class DecimalOperators:    @UsedByGeneratedCode
    public static Slice addLongLongLong(Slice a, Slice b, int rescale, boolean left)
    {
        return internalAddLongLongLong(a, b, rescale, left);
    }