fn init_log() -> u64 {
    env_logger::Builder::from_default_env().init();
    println!("\n ************** initializing logger from env *****************\n");    
    return 1;
}
// install a logger facility
// set RUST_LOG to trace, warn debug off ....
install a logger facility
set RUST_LOG to trace, warn debug off
install a logger facility set RUST_LOG to trace warn debug off
fn init_log() -> u64 {
    env_logger::Builder::from_default_env().init();
    println!("\n ************** initializing logger from env *****************\n");    
    return 1;
}
fn init_log ( ) -> u64 { env_logger :: Builder :: from_default_env ( ) . init ( ) ; println ! ( " \n \n " ) ; return 1 ; }
install a logger facility
set RUST_LOG to trace, warn debug off ....
install a logger facility set RUST_LOG to trace warn debug off ....