The skeletal class used to implement the ZULJSF components
which needs to support
javax.faces.component.ValueHolder .
Components should be declared nested under
org.zkoss.jsf.zul.Page .
see Javadoc of JSF Specification author: Dennis.Chen
getMappedAttributeName() Return ZUL Component attribute to map to value attribute of ValueHolder,
delivering class might override this method to return corresponding name.
Return ZUL Component attribute to map to value attribute of ValueHolder,
delivering class might override this method to return corresponding name.
Note : Default is "value"
See Also:ValueHolderSupport