'Sets the ability of this host to accept new instances.
:param bool enabled:
If this is `True`, the host will accept new instances. If it is
`False`, the host won\'t accept new instances.
:return: If the host can accept further instances, return "enabled",
if further instances shouldn\'t be scheduled to this host,
return "disabled".
:rtype: str'

def set_host_enabled(self, enabled):

    raise NotImplementedError()
