code: def dequeue(self):
      if self.is_empty():
          raise IndexError("Queue is empty")
      value = self._array[self._front]
      self._array[self._front] = None
      self._front += 1
      self._size -= 1
      return value
  
imports: from abc import ABCMeta, abstractmethod
label_desc: Use image node_id 4 for calling the ArrayQueue obj's underlying member method code with example usage: obj.dequeue() and returns: value