package ru.serega6531.packmate.utils; import lombok.experimental.UtilityClass; import org.apache.commons.lang3.ArrayUtils; import ru.serega6531.packmate.model.Packet; import java.util.List; import java.util.Optional; @UtilityClass public class PacketUtils { public static Optional mergePackets(List cut) { return cut.stream() .map(Packet::getContent) .reduce(ArrayUtils::addAll); } }