If you want to use this source, you have to use API included in jar for your BungeeCord plugins. This API is sharing players, and actions that can be performed from 1 bungee and this source will sync action to other ones. That means if player is not on BungeeCord that send action. API will share action to other Bungees through sockets...
/bsyncdebug (Show/hide debug for plugin) bungeesync.command.debug