# File lib/stomp/client.rb, line 214 def ack_context_for(message, headers) id = case protocol when Stomp::SPL_12 'ack' when Stomp::SPL_11 headers.merge!(:subscription => message.headers['subscription']) 'message-id' else 'message-id' end {:message_id => message.headers[id], :headers => headers} end