nl_tokens: removes a socket listener from liveQuery and also destroys the whole liveQuery if no more listeners are present
pl_tokens: function ( socket ) { if ( this . listeners [ socket . id ] ) { delete this . listeners [ socket . <mask> ] if ( Object . keys ( this . listeners ) . length === 0 ) { this . destroy ( ) // this will delete a liveQuery from liveQueries } } else { return new Error ( 'no listener present on LQ ' + this . qKey ) } }