"Need placeholders to add children" Error

From: Arvind Arvind Pro <arvind_dev arvind pro>
To: gtkmm-list <gtkmm-list gnome org>
Subject: "Need placeholders to add children" Error
Date: Mon, 22 Jul 2019 07:49:22 +0530

Hi

I am trying to add a Webkit widget to an area within a box widget.
I am getting this error-
"Widgets of type Box need placeholders to add children"

How do I rectify the above error?

Thanks and sincerely,
Arvind.

Follow-Ups:
- Re: "Need placeholders to add children" Error
  - From: Daniel Boles

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