void (@NotNull VirtualFilePointerContainer that) { checkDisposed(); dropCaches(); addAll(Arrays.asList(that.getUrls())); List<VirtualFilePointer> jarDups = ContainerUtil.map(((VirtualFilePointerContainerImpl)that).myJarDirectories, this::duplicate); List<VirtualFilePointer> jarRecursiveDups = ContainerUtil.map(((VirtualFilePointerContainerImpl)that).myJarRecursiveDirectories, this::duplicate); myJarDirectories.addAllAbsent(jarDups); myJarRecursiveDirectories.addAllAbsent(jarRecursiveDups); }