private void installDefaultRegions() {
		Set<SearchRegion> defaultRegions = new HashSet<>();
		for (SearchRegion region : regionChoices) {
			if (region.isDefault()) {
				defaultRegions.add(region);
			}
		}
		settings = settings.withSelectedRegions(defaultRegions);
	}
Maintains the state of all the settings and controls for the memory search window.
Ghidra/Features/Base/src/main/java/ghidra/features/base/memsearch/gui/SearchGuiModel.java