Since the document that a link is associated with may have changed this method returns %TRUE if the link is still valid (with respect to the document it references) and %FALSE otherwise.
Return: whether or not this link is still valid
See Implementation
Since the document that a link is associated with may have changed this method returns %TRUE if the link is still valid (with respect to the document it references) and %FALSE otherwise.
Return: whether or not this link is still valid