code: def __init__(self, concentration, rate, validate_args=None):
      super().__init__(concentration, rate, validate_args=validate_args)
      self._standard_gamma = RejectionStandardGamma(concentration)
      self.rate = rate
  
imports: import torch
  from pyro.distributions.rejector import Rejector
  from pyro.distributions.score_parts import ScoreParts
  from pyro.distributions.torch import Beta, Dirichlet, Gamma, Normal
  from pyro.distributions.util import copy_docs_from, weakmethod
label_desc: Use image node_id 1 to create a new RejectionGamma object from inherited base classes: Gamma with example: obj = RejectionGamma(concentration, rate, validate_args)