import gwt.react.client.components.StatelessComponent; //导入依赖的package包/类
/**
 * The observer function can be used to turn ReactJS stateless components into reactive
 * components. It wraps the component's render function in mobx.autorun to make sure
 * that any data that is used during the rendering of a component forces a re-rendering
 * upon change.
 *
 * <p>Tip: when observer needs to be combined with other higher-order-functions, make sure
 * that observer is the innermost (first applied) function; otherwise it might do nothing
 * at all.</p>
 *
 * @param statelessComponent The stateless component to make an observer
 * @param <P> The prop type
 * @param <C> The context type
 * @return A wrapped StatelessComponent
 */
public static native <P extends BaseProps, C extends BaseContext> StatelessComponent<P> observer(StatelessComponent<P> statelessComponent);