class_docstr: Class which encapsulates common functionality between all multivariate
  distributions.
code: def __init__(self, seed=None):
      super().__init__()
      self._random_state = check_random_state(seed)
  
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 1 to create a new multi_rv_generic object  with example: obj = multi_rv_generic(seed)