code: public PolicyExecutor create(String fullIdentifier, String owner) {
          return new PolicyExecutorImpl((ExecutorServiceImpl) globalExecutor, fullIdentifier, owner, policyExecutors);
      }
docs: Creates a new policy executor instance for use by a single application.
  Policy executors owned by this application can be shut down via the shutdownNow method of this class.
  
  @param fullIdentifier unique identifier for the new instance, to be used for monitoring and problem determination.
  @param owner name of application that the policy executor is created for.
  @return a new policy executor instance.
  @throws IllegalStateException if an instance with the specified unique identifier already exists and has not been shut down.
  @throws NullPointerException if the specified identifier is null