*
* @param drawStyleValue the <code>String</code> value of <code>DrawStyleAttribute</code>, see {@odf.attribute draw:style} at specification
* @return the element {@odf.element draw:opacity}
*/
public DrawOpacityElement newDrawOpacityElement(String drawStyleValue) {
DrawOpacityElement drawOpacity = ((OdfFileDom) this.ownerDocument).newOdfElement(DrawOpacityElement.class);
drawOpacity.setDrawStyleAttribute(drawStyleValue);
this.appendChild(drawOpacity);
return drawOpacity;
}