<p>This will always fail if the parent is null.</p>
@param name The feature name.
@param value The requested feature value.
@exception org.xml.sax.SAXNotRecognizedException If the feature
value can't be assigned or retrieved from the parent.
@exception org.xml.sax.SAXNotSupportedException When the
parent recognizes the feature name but
cannot set the requested value.
Set the value of a feature.
<p>This will always fail if the parent is null.</p>
@param name The feature name. @param value The requested feature value. @exception org.xml.sax.SAXNotRecognizedException If the feature value can't be assigned or retrieved from the parent. @exception org.xml.sax.SAXNotSupportedException When the parent recognizes the feature name but cannot set the requested value.