code: private void removeFromReplicaLayer(final Node followedReplica) {
  		final Node prev = NeoUtils.getPrevSingleNode(followedReplica,
  				SocialGraphRelationshipType.GRAPHITY);
  		final Node next = NeoUtils.getNextSingleNode(followedReplica,
  				SocialGraphRelationshipType.GRAPHITY);
  
  		// bridge the user replica in the replica layer
  		prev.getSingleRelationship(SocialGraphRelationshipType.GRAPHITY,
  				Direction.OUTGOING).delete();
  		if (next != null) {
  			next.getSingleRelationship(SocialGraphRelationshipType.GRAPHITY,
  					Direction.INCOMING).delete();
  			prev.createRelationshipTo(next,
  					SocialGraphRelationshipType.GRAPHITY);
  		}
  
  		// remove the followship
  		followedReplica.getSingleRelationship(
  				SocialGraphRelationshipType.FOLLOW, Direction.INCOMING)
  				.delete();
  
  		// remove the replica node itself
  		followedReplica.getSingleRelationship(
  				SocialGraphRelationshipType.REPLICA, Direction.OUTGOING)
  				.delete();
  		followedReplica.delete();
  	}
docs: remove a followed user from the replica layer
  
  @param followedReplica
  replica of the user that will be removed