The content area of a #TeplInfoBar contains a vertical container containing:
First, an horizontal container containing:
A place for an optional icon.
The %TEPL_INFO_BAR_LOCATION_ALONGSIDE_ICON location, which is a vertical
container that can contain: primary/secondary messages plus additional
widgets, in the order that they are added.
The %TEPL_INFO_BAR_LOCATION_BELOW_ICON location, which can contain
additional widgets, in the order that they are added. So the widgets added
here are under the icon and under the
%TEPL_INFO_BAR_LOCATION_ALONGSIDE_ICON location.
Location inside the content area.
The content area of a #TeplInfoBar contains a vertical container containing: