class_docstr: Missing Dependency Class.
  
  Used to replace any object that requires unmet optional dependencies. Attribute access or calling the __call__
  method on this object will raise an error.
docstr: Generate error message informing user to install missing dependencies.
code: def err_msg(self) -> str:
      """Generate error message informing user to install missing dependencies."""
      return err_msg_template.substitute(
          object_name=self.object_name,
          missing_dependency=self.missing_dependency,
      )
  
file_path: alibi-detect/alibi_detect/utils/missing_optional_dependency.py
imports: from typing import Union, List, Optional, Any
  from string import Template
  from importlib import import_module
label_desc: Use image node_id 2 for calling the MissingDependency obj's underlying member method code with example usage: obj.err_msg() and returns: err_msg_template