class_docstr: AbstractSampler base class for optimizer-directed samplers
      
docstr: initialize the ensemble solver
code: def _init_solver(self):
      """initialize the ensemble solver"""
      from mystic.abstract_ensemble_solver import AbstractEnsembleSolver
  
      return AbstractEnsembleSolver(len(self._bounds), npts=self._npts)
  
file_path: mystic/mystic/abstract_sampler.py
label_desc: Use image node_id 2 for calling the AbstractSampler obj's underlying member method code with example usage: obj._init_solver() and returns: AbstractEnsembleSolver