@Nullable
  protected Icon computeIcon() {
    Icon icon = myUsageInfo.getIcon();
    if (icon != null) {
      return icon;
    }
    PsiElement psiElement = getElement();
    return psiElement != null && psiElement.isValid() && !isFindInPathUsage(psiElement) ? psiElement.getIcon(0) : null;
  }
@Nullable
  protected Icon computeIcon()