@Nullable
    protected String getTypeParameter(@NotNull CommentTracker ct, @NotNull PsiMethodCallExpression qualifierCall) {
      PsiReferenceParameterList parameterList = qualifierCall.getMethodExpression().getParameterList();
      if (parameterList == null) return null;
      PsiTypeElement[] elements = parameterList.getTypeParameterElements();
      return elements.length == 1 ? ct.text(elements[0]) : null;
    }
@Nullable
    protected String getTypeParameter(@NotNull CommentTracker ct, @NotNull PsiMethodCallExpression qualifierCall)