@NotNull
  private TextRange getOccurrenceRange(@NotNull Object occurrence) {
    if (occurrence instanceof PsiElement) {
      return ((PsiElement)occurrence).getTextRange();
    }
    else if (occurrence instanceof UsageInfo) {
      Segment segment = ((UsageInfo)occurrence).getSegment();
      assert segment != null;
      return TextRange.create(segment);
    }
    else {
      //assert occurrence instanceof Target;
      //noinspection unchecked
      return ((Target)occurrence).getTextRange();
    }
  }
@NotNull
  private TextRange getOccurrenceRange(@NotNull Object occurrence)