code: def event_shape(self) -> Tuple:
      return self.distr_output.event_shape
  
imports: from typing import Optional, Tuple
  from mxnet import gluon
  from gluonts.core.component import validated
  from gluonts.mx import Tensor
  from .deterministic import Deterministic
  from .distribution import Distribution, getF, nans_like
  from .distribution_output import DistributionOutput
  from .mixture import MixtureDistribution
label_desc: Use image node_id 4 for calling the NanMixtureOutput obj's underlying member method code with example usage: obj.event_shape() and returns: self