presto-spi/src/main/java/io/prestosql/spi/predicate/Marker.java/Marker/exactly
class Marker:    public static Marker exactly(Type type, Object value)
    {
        requireNonNull(type, "type is null");
        requireNonNull(value, "value is null");
        return create(type, Optional.of(value), Bound.EXACTLY);
    }