public static Corleone context(String jobContext){
  if (jobContext == null || jobContext.equals("")) {
    throw new IllegalArgumentException("Job context must not be null or empty.");
  }
  contexts.clear();
  contexts.add(jobContext);
  return getInstance();
}

public static Corleone context ( String jobContext ) { if ( jobContext == null || jobContext . equals ( "" ) ) { throw new IllegalArgumentException ( "Job context must not be null or empty." ) ; } contexts . clear ( ) ; contexts . add ( jobContext ) ; return getInstance ( ) ; }
provides a corleone instance to work on the given context .
