Purpose

As a developer I want to add a gap between panes in the same way I could with CSS Grid.

Proposal

One approach could be to do this through documentation. I wonder if with suitable CSS selectors we can recreate the effect?

A full on approach might be to replace the absolutely positioned elements with an actual flexbox/grid layout?

A halfway-house could be to introduce a prop but implement with CSS.

This is related to requests for a customisable separator but not identical.

Acceptance criteria

• As a developer I can add a gap with specific width between panes
• As a developer I can control the color of the gap