code: def rvs(self, size=1, random_state=None):
      return self._dist.rvs(self.mean, self.cov, size, 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 6 for calling the multivariate_normal_frozen obj's underlying member method code with example usage: obj.rvs(size, random_state) and returns: self