code: public void setStyles(String styles) {
  		this.styles = styles;
  		if (eventBus != null && parentLayer != null) {
  			eventBus.fireEvent(new LayerStyleChangedEvent(parentLayer));
  		}
  	}
docs: Set the styles parameter to be used in the GetMap requests.
  
  @param styles The styles parameter to be used in the GetMap requests.