public void setFormatManager(FormatManager formatManager) {
		List<ListingHighlightProvider> highlightProviders =
			this.formatManager.getHighlightProviders();

		this.formatManager = formatManager;

		for (ListingHighlightProvider provider : highlightProviders) {
			this.formatManager.addHighlightProvider(provider);
		}

		if (headerPanel != null) {
			showHeader(false);
		}
		if (listingModel != null) {
			listingModel.setFormatManager(formatManager);
		}
		layoutModel.dataChanged(true);
	}
Sets listing panel to never show scroll bars.
<p>
This is useful when you want this listing's parent to always be as big as this listing.
Ghidra/Features/Base/src/main/java/ghidra/app/util/viewer/listingpanel/ListingPanel.java