'Destroy a target instance.
:param  targetinstance: TargetInstance object to destroy
:type   targetinstance: :class:`GCETargetInstance`
:return:  True if successful
:rtype:   ``bool``'

def ex_destroy_targetinstance(self, targetinstance):

    request = ('/zones/%s/targetInstances/%s' % (targetinstance.zone.name, targetinstance.name))
    self.connection.async_request(request, method='DELETE')
    return True
