code: @Override
    protected List<ConfigIssue> init() {
      List<ConfigIssue> issues = super.init();
      if (getContext().getOutputLanes().size() != 1) {
        issues.add(getContext().createConfigIssue(
          null,
          null,
          Errors.API_00,
          getInfo().getInstanceName(),
          1,
          getContext().getOutputLanes().size()));
      } else {
        outputLane = getContext().getOutputLanes().iterator().next();
      }
      setSuperInitCalled();
      return issues;
    }
docs: Performs the <code>SingleLaneProcessor</code> required initialization. Subclasses overriding this method must
  call <code>super.init()</code>.
  
  @return the list of configuration issues found during initialization, an empty list if none.