exapleUsageRetry.scala

val bfr = new BigFailRepository with Retrying[String]
println("failed result: " + bfr.withConnection {conn => Option("failure result")})

val sfr = new SmallFailRepository with Retrying[String]
println("success result: " + sfr.withConnection {conn => Option("should fail first, succeed later")})
    
val nfr = new NoFailRepository with Retrying[String]
println("success result: " + nfr.withConnection {conn => Option("should not fail result")})