docs: def submit(self, coro, callback=None):
          """Submit a coro as NewTask to self.loop without loop.frequncy control.
  
          ::
  
              from torequests.dummy import Loop
              import asyncio
              loop = Loop()
  
              async def test(i):
                  result = await asyncio.sleep(1)
                  return (loop.frequency, i)
  
              coro = test(0)
              task = loop.submit(coro)
              print(task)
              # loop.x can be ignore
              loop.x
              print(task.x)
  
              # <NewTask pending coro=<test() running at torequests/temp_code.py:58>>
              # (Frequency(sem=<0/0>, interval=0, name=loop_sem), 0)
          """
          callback = callback or self.default_callback
          if self.async_running:
              return self.run_coroutine_threadsafe(coro, callback=callback)
          else:
              return NewTask(coro, loop=self.loop, callback=callback)