class_docstr: Base class for defining an agent.
docstr: Save model to file.
docstr_tok: ["Save","model","to","file","."]
code: def save(self, filename):
      """Save model to file."""
      pass
  
imports: from abc import ABCMeta, abstractmethod
  import numpy
  from importlib import import_module
  from .shared.discretize import BoxSpaceDiscretizer
label_desc: Use image node_id 5 for calling the AgentBaseClass obj's underlying member method code with example usage: obj.save(filename) without return types