public void clearVertexLocations(FunctionGraph functionGraph) {
		locationUpdateMap.clear(); // clear any unsaved changes
		groupLocationUpdateMap.clear();

		int transactionID = programUserData.startTransaction();
		try {
			ObjectPropertyMap<SaveablePoint> vertexLocationPropertyMap =
				programUserData.getObjectProperty(FunctionGraphPlugin.class.getSimpleName(),
					LOCATION_PROPERTY_NAME, SaveablePoint.class, false);
			clearMap(vertexLocationPropertyMap, functionGraph);

			ObjectPropertyMap<SaveablePoint> groupVertexLocationPropertyMap =
				programUserData.getObjectProperty(FunctionGraphPlugin.class.getSimpleName(),
					GROUP_LOCATION_PROPERTY_NAME, SaveablePoint.class, false);
			clearMap(groupVertexLocationPropertyMap, functionGraph);
		}
		finally {
			programUserData.endTransaction(transactionID);
		}
	}
Clears all vertex locations (including group vertex locations).
@param functionGraph function graph
Ghidra/Features/FunctionGraph/src/main/java/ghidra/app/plugin/core/functiongraph/mvc/FunctionGraphVertexAttributes.java