returns the backing executor service . concode_field_sep String NOT_ALLOWED concode_elem_sep ExecutorService executor concode_field_sep Future<T> submit concode_elem_sep Future<T> submit concode_elem_sep Future<?> submit concode_elem_sep boolean isTerminated concode_elem_sep List<Future<T>> invokeAll concode_elem_sep List<Future<T>> invokeAll concode_elem_sep boolean awaitTermination concode_elem_sep List<Runnable> shutdownNow concode_elem_sep T invokeAny concode_elem_sep T invokeAny concode_elem_sep void setBackingExecutor concode_elem_sep void execute concode_elem_sep void shutdown concode_elem_sep boolean isShutdown
ExecutorService function ( ) { return executor ; }