private void disposeProviderList() {
		for (LocationReferencesProvider provider : providerList) {
			provider.dispose();
		}
		providerList.clear();
	}
@see ghidra.framework.plugintool.Plugin#dispose()
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/navigation/locationreferences/LocationReferencesPlugin.java