question: return the concurrency for the listener , if any . concode_field_sep String destination concode_elem_sep String selector concode_elem_sep String id concode_elem_sep String subscription concode_elem_sep String concurrency concode_field_sep String getDestination concode_elem_sep void setConcurrency concode_elem_sep String getId concode_elem_sep void setupJcaMessageContainer concode_elem_sep void setDestination concode_elem_sep void setSubscription concode_elem_sep MessageListener createMessageListener concode_elem_sep void setupJmsListenerContainer concode_elem_sep void setupMessageListener concode_elem_sep void configureEndpoint concode_elem_sep String getSelector concode_elem_sep StringBuilder getEndpointDescription concode_elem_sep void setId concode_elem_sep void setSelector concode_elem_sep String toString concode_elem_sep String getSubscription concode_elem_sep void setupListenerContainer
target: String function ( ) { return this . concurrency ; }