code: def _internal_sampler(self) -> tp.ArrayLike:
      raise NotImplementedError(
          "Missing sampling function! which is quite necessary for a sampler."
      )
  
imports: import numpy
  from numpy.random import RandomState
  import nevergrad.common.typing
  from nevergrad.common.decorators import Registry
label_desc: Use image node_id 2 for calling the Sampler obj's underlying member method code with example usage: obj._internal_sampler() without return types