code: def sample(self):
      if len(self._cache) == 0:
          self.refresh_cache()
      return self._cache.pop()
  
file_path: imodels/imodels/experimental/bartpy/samplers/scalar.py
imports: from typing import Any, List
  import numpy
label_desc: Use image node_id 2 for calling the NormalScalarSampler obj's underlying member method code with example usage: obj.sample() and returns: self