code: def marginal_prob(self, x0, t, y):
      return self._mean(x0, t, y), self._std(t)
  
imports: import abc
  import warnings
  import numpy
  import torch
label_desc: Use image node_id 7 for calling the OUVESDE obj's underlying member method code with example usage: obj.marginal_prob(x0, t, y) and returns: self,  self