Spark Job Server application compilation issue

[sujeet jog]

Input is a json request, which would be decoded in myJob() & processed
further.

Not sure what is wrong with below code, it emits errors as unimplemented
methods (runJob/validate),
any pointers on this would be helpful,

jobserver-0.8.0

object MyJobServer extends SparkSessionJob {

  type JobData = String
  type JobOutput = Seq[String]

  def myJob(a : String)  = {
}

  def runJob(sc: SparkContext, runtime: JobEnvironment, data: JobData):
JobOutput = {
           myJob(a)
   }

 def validate(sc: SparkContext, runtime: JobEnvironment, config: Config):
JobData Or Every[ValidationProblem] = {
   Good(config.root().render())
 }