public String getWindowGroup() {
		return group;
	}
Returns an optional group designator that, if non-null, the docking window manager uses to
determine the initial location of the new component relative to any existing instances
of this component Provider.
<p>
The docking window manager will use {@link #getIntraGroupPosition() Intra-group Position}
to decide where to place this provider inside of the already open instances of the
same group.  The default position is 'stack', which results in the new instance being
stacked with other instances of this provider that have the same group unless that instance is
the active provider or is currently stacked with the active provider. (This is to prevent
new windows from covering the active window).

@return the window group
Ghidra/Framework/Docking/src/main/java/docking/ComponentProvider.java