def by_unified_role_management_policy_assignment_id(self,unified_role_management_policy_assignment_id: str) -> UnifiedRoleManagementPolicyAssignmentItemRequestBuilder:
        """
        Provides operations to manage the roleManagementPolicyAssignments property of the microsoft.graph.policyRoot entity.
        param unified_role_management_policy_assignment_id: The unique identifier of unifiedRoleManagementPolicyAssignment
        Returns: UnifiedRoleManagementPolicyAssignmentItemRequestBuilder
        """
        if unified_role_management_policy_assignment_id is None:
            raise TypeError("unified_role_management_policy_assignment_id cannot be null.")
        from .item.unified_role_management_policy_assignment_item_request_builder import UnifiedRoleManagementPolicyAssignmentItemRequestBuilder

        url_tpl_params = get_path_parameters(self.path_parameters)
        url_tpl_params["unifiedRoleManagementPolicyAssignment%2Did"] = unified_role_management_policy_assignment_id
        return UnifiedRoleManagementPolicyAssignmentItemRequestBuilder(self.request_adapter, url_tpl_params)

        Provides operations to manage the roleManagementPolicyAssignments property of the microsoft.graph.policyRoot entity.
        param unified_role_management_policy_assignment_id: The unique identifier of unifiedRoleManagementPolicyAssignment
        Returns: UnifiedRoleManagementPolicyAssignmentItemRequestBuilder
        
msgraph/generated/policies/role_management_policy_assignments/role_management_policy_assignments_request_builder.py