class_docstr: Class which encapsulates common functionality between all multivariate
  distributions.
code: def _get_random_state(self, random_state):
      if random_state is not None:
          return check_random_state(random_state)
      else:
          return self._random_state
  
imports: import numpy
  import scipy.linalg
  from scipy._lib import doccer
  from scipy.special import gammaln
  from scipy._lib._util import check_random_state
  from scipy.stats import mvn
label_desc: Use image node_id 4 for calling the multi_rv_generic obj's underlying member method code with example usage: obj._get_random_state(random_state) and returns: check_random_state, self