@Nls
          @Override
          public @Nullable String getCustomContainerName() {
            PsiElement psiElement = getElement();
            if (psiElement == null) return null;
            return UniqueVFilePathBuilder.getInstance()
              .getUniqueVirtualFilePath(psiElement.getProject(), psiElement.getContainingFile().getVirtualFile());
          }
@Nls
          @Override
          public @Nullable String getCustomContainerName()