if (this.stylesByName.get("default") == null ) { addCssBlock(DEFAULT_STYLE); }
	public void inherit() {		//TODO rob create default-style when not explicitely defined.		Style[] allStyles = getAllStyles();		for (int i = 0; i < allStyles.length; i++) {			Style style = allStyles[i];			checkInheritanceHierarchy( style );			String parentName = style.getParentName();			if (parentName != null) {				Style parent = getStyle( parentName );				if (parent == null) {					throw new BuildException("Invalid CSS code: the style [" + style.getSelector() + "] extends the non-existing style [" + parentName + "].");				}				style.setParent( parent );			}		}	}