def invoke_prerequisites_concurrently(task_args, invocation_chain)# :nodoc:
      futures = prerequisite_tasks.map do |p|
        prereq_args = task_args.new_scope(p.arg_names)
        application.thread_pool.future(p) do |r|
          r.invoke_with_call_chain(prereq_args, invocation_chain)
        end
      end
      # Iterate in reverse to improve performance related to thread waiting and switching
      futures.reverse_each(&:value)
    end
def invoke_prerequisites_concurrently(task_args, invocation_chain)# :nodoc:
      futures = prerequisite_tasks.map do |p|
        prereq_args = task_args.new_scope(p.arg_names)
        application.thread_pool.future(p) do |r|
          r.invoke_with_call_chain(prereq_args, invocation_chain)
        end
      end
      # Iterate in reverse to improve performance related to thread waiting and switching
      futures.reverse_each(&:value)
    end
Invoke all the prerequisites of a task in parallel.