key = models.ForeignKey(Key, related_name='slivers')
slice = models.ForeignKey(Slice, related_name='slivers')
node = models.ForeignKey(Node, related_name='slivers')
key = models.ForeignKey(Key, related_name='slivers')
slice = models.ForeignKey(Slice, related_name='slivers')
node = models.ForeignKey(Node, related_name='slivers')