<p> Sets the text data of this node or this method will throw an <code>UnsupportedOperationException</code> if it is read-only. </p>
@param text is the new textual value of this node
See Implementation
<p> Sets the text data of this node or this method will throw an <code>UnsupportedOperationException</code> if it is read-only. </p>
@param text is the new textual value of this node