class_docstr: Constructs a multivariate normal random variable, based on mean and covariance.
  Can be multivariate, or a batch of multivariate normals
  
  Passing a vector mean corresponds to a multivariate normal.
  Passing a matrix mean corresponds to a batch of multivariate normals.
  
  :param mean: `... x N` mean of mvn distribution.
  :param covariance_matrix: `... x N X N` covariance matrix of mvn distribution.
  :param validate_args: If True, validate `mean` anad `covariance_matrix` arguments. (Default: False.)
  
  :ivar torch.Size base_sample_shape: The shape of a base sample (without
      batching) that is used to generate a single sample.
  :ivar torch.Tensor covariance_matrix: The covariance matrix, represented as a dense :class:`torch.Tensor`
  :ivar ~linear_operator.LinearOperator lazy_covariance_matrix: The covariance matrix, represented
      as a :class:`~linear_operator.LinearOperator`.
  :ivar torch.Tensor mean: The mean.
  :ivar torch.Tensor stddev: The standard deviation.
  :ivar torch.Tensor variance: The variance.
code: def lazy_covariance_matrix(self) -> LinearOperator:
      if self.islazy:
          return self._covar
      else:
          return to_linear_operator(super().covariance_matrix)
  
imports: from __future__ import annotations
  import math
  import warnings
  from numbers import Number
  from typing import Optional, Tuple, Union
  import torch
  from linear_operator import to_dense, to_linear_operator
  from linear_operator.operators import DiagLinearOperator, LinearOperator, RootLinearOperator
  from torch import Tensor
  from torch.distributions import MultivariateNormal
  from torch.distributions.kl import register_kl
  from torch.distributions.utils import _standard_normal, lazy_property
  from ..None import settings
  from ..utils.warnings import NumericalWarning
  from .distribution import Distribution
label_desc: Use image node_id 12 for calling the MultivariateNormal obj's underlying member method code with example usage: obj.lazy_covariance_matrix() and returns: self, to_linear_operator