public static @NotNull String calcAbbreviatedPackageFQName(@NotNull PsiPackage aPackage) {
    final StringBuilder name = new StringBuilder(aPackage.getName());
    for (PsiPackage parentPackage = aPackage.getParentPackage(); parentPackage != null; parentPackage = parentPackage.getParentPackage()) {
      final String packageName = parentPackage.getName();
      if (packageName == null || packageName.isEmpty()) {
        break; // reached default package
      }
      name.insert(0, ".");
      if (packageName.length() > 2 && shouldAbbreviateName(parentPackage)) {
        name.insert(0, packageName.charAt(0));
      }
      else {
        name.insert(0, packageName);
      }
    }
    return name.toString();
  }
public static @NotNull String calcAbbreviatedPackageFQName(@NotNull PsiPackage aPackage)