code: def validate(opts):
      
      if hasattr(opts, 'extensions'):
          return _validate(opts.extensions)
      elif isinstance(opts, list):
          return _validate(opts)
      else:
          raise ValueError("Value passed into extension validation must either "
                           "be a list of strings or a namespace with an "
                           "attribute of 'extensions'")
docs: Client-facing validate method. Checks to see if the passed in opts
      argument is either a list or a namespace containing the attribute
      'extensions' and runs validations on it accordingly. If opts is neither
      of those things, this will raise a ValueError
  
      :param opts: either a list of strings or a namespace with the attribute
          'extensions'
      :raises ValueError: if the value passed in is not a list or a namespace
          with the attribute 'extensions'
      :raises ValidationException: if the extensions fail validations
      :return: True if extensions pass the validations