code: def new(arg_name, annotated_with=None):
      
      if arg_name.startswith(_PROVIDE_PREFIX):
          binding_key_name = arg_name[_PROVIDE_PREFIX_LEN:]
          provider_indirection = provider_indirections.INDIRECTION
      else:
          binding_key_name = arg_name
          provider_indirection = provider_indirections.NO_INDIRECTION
      binding_key = binding_keys.new(binding_key_name, annotated_with)
      return ArgBindingKey(arg_name, binding_key, provider_indirection)
docs: Creates an ArgBindingKey.
  
      Args:
        arg_name: the name of the bound arg
        annotation: an Annotation, or None to create an unannotated arg binding
            key
      Returns:
        a new ArgBindingKey