Currently ChannelDispatchOperation::claim() only calls CD.Claim() and do not update the HandledChannels properly indicating that the channels are being handled.

Solution 1:
 - include a CD::claim(handler) that will call CD.Claim() and update the HandledChannels property correctly, and update the current claim() method docs to indicate it should be used only for approvers wishing to close the channels (not handle them). 

Solution 2:
 - change the current claim() method to create a internal handler with an empty filter and keep it around till the channels are closed and update HandledChannels accordingly.

Solution 3:
 - A mix of both or ???