code: def randn(self):
      return np.array(np.random.randn(*self.shape)).astype(
          self.dtype
      ) + 1.0j * np.array(np.random.randn(*self.shape)).astype(
          self.dtype
      )
  
imports: import numpy
  from autograd.extend import VSpace
  from autograd.builtins import NamedTupleVSpace
label_desc: Use image node_id 4 for calling the ComplexArrayVSpace obj's underlying member method code with example usage: obj.randn() and returns: unknown