code: def zstack_array(self, s=0, c=0, t=0):
          
          return np.dstack([x.image for x in self.zstack_proxy_iterator(s=s, c=c, t=t)])
docs: Return zstack as a :class:`numpy.ndarray`.
          
          :param s: series
          :param c: channel
          :param t: timepoint
          :returns: zstack as a :class:`numpy.ndarray`