code: public static void extendDatabaseSchema(final App app, final JsonSchema newSchema) throws FrameworkException, URISyntaxException {
  
  		try (final Tx tx = app.tx()) {
  
  			newSchema.createDatabaseSchema(app, JsonSchema.ImportMode.extend);
  
  			tx.success();
  		}
  	}
docs: Extend the current Structr schema by the elements contained in the given new schema.
  
  @param app
  @param newSchema the new schema to add to the current Structr schema
  
  @throws FrameworkException
  @throws URISyntaxException