def by_authentication_strength_policy_id(self,authentication_strength_policy_id: str) -> AuthenticationStrengthPolicyItemRequestBuilder:
        """
        Provides operations to manage the policies property of the microsoft.graph.authenticationStrengthRoot entity.
        param authentication_strength_policy_id: The unique identifier of authenticationStrengthPolicy
        Returns: AuthenticationStrengthPolicyItemRequestBuilder
        """
        if authentication_strength_policy_id is None:
            raise TypeError("authentication_strength_policy_id cannot be null.")
        from .item.authentication_strength_policy_item_request_builder import AuthenticationStrengthPolicyItemRequestBuilder

        url_tpl_params = get_path_parameters(self.path_parameters)
        url_tpl_params["authenticationStrengthPolicy%2Did"] = authentication_strength_policy_id
        return AuthenticationStrengthPolicyItemRequestBuilder(self.request_adapter, url_tpl_params)

        Provides operations to manage the policies property of the microsoft.graph.authenticationStrengthRoot entity.
        param authentication_strength_policy_id: The unique identifier of authenticationStrengthPolicy
        Returns: AuthenticationStrengthPolicyItemRequestBuilder
        
msgraph/generated/identity/conditional_access/authentication_strength/policies/policies_request_builder.py