Function init_tracing 

pub fn init_tracing<T, U, V>(
    stdout: &T,
    file: &U,
    defaults: &V,
    layers_opt: Option<Vec<Box<dyn Layer<Registry> + Send + Sync>>>,
) -> Result<()>
where
    T: TracingConfigExt,
    U: TracingConfigExt,
    V: PathDefaults,

Initialize tracing

Errors

• If the path to the tracing file cannot be created or found