docs: def multi_evaluate(self, x, out=None):
          """Evaluate log of the density to propose ``x``, namely log(q(x))
          for each row in x.
  
          :param x:
  
              Matrix-like array; the proposed points. Expect i-th accessible
              as ``x[i]``.
  
          :param out:
  
              Vector-like array, length==``len(x)``, optional; If provided,
              the output is written into this array.
  
          """
          if out is None:
              out = _np.empty(len(x))
          else:
              assert len(out) == len(x)
  
          for i, point in enumerate(x):
              out[i] = self.evaluate(point)
  
          return out