code: private static void addLogoToHeader(final HorizontalLayout topHeader) {
  		final ThemeResource ciaLogoResource = new ThemeResource("cia-logo.png");
  		final Image ciaLogoImage = new Image(null,ciaLogoResource);
  		topHeader.addComponent(ciaLogoImage);
  		ciaLogoImage.setWidth("60px");
  		ciaLogoImage.setHeight("60px");
  		topHeader.setComponentAlignment(ciaLogoImage, Alignment.MIDDLE_LEFT);
  		topHeader.setExpandRatio(ciaLogoImage, ContentRatio.SMALL);
  	}
docs: Adds the logo to header.
  
  @param topHeader
  the top header