code: public Optional<JobDefinition> getJobDefinition(final String jobType) {
          return jobDefinitions
                  .stream()
                  .filter((j) -> j.jobType().equalsIgnoreCase(jobType))
                  .findAny();
      }
docs: Returns an optional JobDefinition matching the given jobType.
  
  @param jobType case insensitive {@link JobDefinition#jobType() job type}
  @return optional JobDefinition