Layout question (was: Merging table cells possible?)

Version/Branch of Dear ImGui:

Version 1.9x, Branch: docking

Back-ends:

imgui_impl_opengl.cpp + imgui_impl_glfw.cpp

Compiler, OS:

gcc-12, Linux, X11

Full config/build information:

No response

Details:

Simple question: Is there some way to merge table cells?

I'd like to create a 3×2 table with cells merged in this configuration

+----+----+----+
|    |    |    |
+----+----+    +
|         |    |
+----+----+----+

and in this configuration

+----+----+----+
|    |    |    |
+    +----+    +
|    |    |    |
+----+----+----+

To goal is to put a couple of widgets in there, where their arrangement relative to each other is easiest defined by a tabular layout with these relationships.

Screenshots/Video:

No response

Minimal, Complete and Verifiable Example code: