nl_tokens: subscribe method gets the oEventsCallbacks object with all the handlers and add these handlers to the channel .
pl_tokens: function subscribe ( oSubscriber ) { const oEventsCallbacks = oSubscriber . events ; if ( ! oSubscriber || oEventsCallbacks === und ) { return false ; } iterateObject ( oEventsCallbacks , function ( oItem , sChannelId ) { if ( oChannels [ sChannelId ] === und ) { oChannels [ sChannelId ] = { } ; } _addSubscribers ( oItem , sChannelId , oSubscriber ) ; } ) ; return <mask> ; }