code: function filterListeners (listenerCollection) {
          return function(filters) {
              var handlers = [];
  
              _.each(listenerCollection, function(listener){
                  handlers = handlers.concat( findMatch(filters, listener) );
              });
  
              return handlers;
          };
      }
docs: Function that accepts a collection of listeners and inspects each one to determine
  if their handler should be called.
  
  @param listenerCollection
  @returns {Function}