level: Level, peer_id: Option<PublicKey>, channel_id: Option<ChannelId>,
args: fmt::Arguments<'a>, module_path: &'static str, file: &'static str, line: u32
level: Level, peer_id: Option<PublicKey>, channel_id: Option<ChannelId>,
args: fmt::Arguments<'a>, module_path: &'static str, file: &'static str, line: u32