pub fn init(log_name: &str)Expand description
Initializes tracing in a standard way.
The environment variables RUST_LOG, RUST_LOG_SPAN_EVENTS, and RUST_LOG_FORMAT
can be used to control the verbosity, the span event verbosity, and the output format,
respectively.
The LINERA_LOG_DIR environment variable can be used to configure a directory to
store log files. If it is set, a file named log_name with the log extension is
created in the directory.