How to render element in gwt?

From last few months I am working on gwt-ext.In that I am using a doLayout() method of Container class.Here is de开发者_运维知识库scription of it.

Force this container's layout to be recalculated. A call to this function is required after adding a new component to an already rendered container. If you are not dynamically adding and removing components after render, this function will generally not need to be called.

Do this method is basically used to render container. Now I am using core gwt 2.3. Is there any method to render the container in gwt.or any other way to achieve this ???

Thanks in advance

AFAIK, GWT does not require this. Just call .add() on any Panel to add children. They should be immediately visible.