public String getSubTitle(ComponentProvider provider) {
		ComponentPlaceholder placeholder = getActivePlaceholder(provider);
		if (placeholder != null) {
			return placeholder.getSubTitle();
		}
		return "";
	}
Returns the current subtitle for the component for the given provider.

@param provider the component provider of the component for which to get its subtitle.
@return the current subtitle for the component for the given provider.
Ghidra/Framework/Docking/src/main/java/docking/DockingWindowManager.java