log::trace!

macro_rules! trace {
    ($($arg:tt)*) => (
        log!($crate::LogLevel::Trace, $($arg)*);
    )
}

Logs a message at the trace level.

Logging at this level is disabled if any of the following cfgs are present: log_level = "off", log_level = "error", log_level = "warn", log_level = "info", or log_level = "debug".