@NotNull
 @Override
 public final MultiplePsiFilesPerDocumentFileViewProvider createCopy(
     @NotNull final VirtualFile fileCopy) {
   final MultiplePsiFilesPerDocumentFileViewProvider copy = cloneInner(fileCopy);
   copy.myOriginal = myOriginal == null ? this : myOriginal;
   return copy;
 }
 @Override
 protected PsiFile getPsiInner(@NotNull final Language target) {
   PsiFileImpl file = myRoots.get(target);
   if (file == null) {
     if (isPhysical()) {
       VirtualFile virtualFile = getVirtualFile();
       if (isIgnored()) return null;
       VirtualFile parent = virtualFile.getParent();
       if (parent != null) {
         getManager().findDirectory(parent);
       }
     }
     if (target != getBaseLanguage() && !getLanguages().contains(target)) {
       return null;
     }
     file = (PsiFileImpl) createFile(target);
     if (file == null) return null;
     if (myOriginal != null) {
       final PsiFile originalFile = myOriginal.getPsi(target);
       if (originalFile != null) {
         file.setOriginalFile(originalFile);
       }
     }
     file = ConcurrencyUtil.cacheOrGet(myRoots, target, file);
   }
   return file;
 }