How to prevent GWT from generating inline styles?

When I, for example, add a SimplePanel to my page I get a div like

<div style="position: r开发者_运维技巧elative; " class="myClass" ...

This inline style overrides my custom style defined for myClass.

How to prevent GWT from generating this inline style ? Or how to set it's content exlicitly to what i want ?

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Use somePanel. getElement().getStyle().setDisplay(Style.Display.BLOCK);