Return the user friendly name for this node.  if the display name \
        is not implicitly set, then the words for the object name \
        will be used.
        
        :return     <str>

def displayName( self ):
        """
        Return the user friendly name for this node.  if the display name \
        is not implicitly set, then the words for the object name \
        will be used.
        
        :return     <str>
        """
        if ( not self._displayName ):
            return projex.text.pretty(self.objectName())
        return self._displayName