pub keys_manager: &'a TestKeysInterface,
pub update_ret: Mutex<Option<Result<(), channelmonitor::ChannelMonitorUpdateErr>>>,
/// If this is set to Some(), after the next return, we'll always return this until update_ret
pub keys_manager: &'a TestKeysInterface,
pub update_ret: Mutex<Option<Result<(), channelmonitor::ChannelMonitorUpdateErr>>>,
/// If this is set to Some(), after the next return, we'll always return this until update_ret