def by_approval_id(self,approval_id: str) -> ApprovalItemRequestBuilder:
        """
        Provides operations to manage the assignmentApprovals property of the microsoft.graph.privilegedAccessGroup entity.
        param approval_id: The unique identifier of approval
        Returns: ApprovalItemRequestBuilder
        """
        if approval_id is None:
            raise TypeError("approval_id cannot be null.")
        from .item.approval_item_request_builder import ApprovalItemRequestBuilder

        url_tpl_params = get_path_parameters(self.path_parameters)
        url_tpl_params["approval%2Did"] = approval_id
        return ApprovalItemRequestBuilder(self.request_adapter, url_tpl_params)

        Provides operations to manage the assignmentApprovals property of the microsoft.graph.privilegedAccessGroup entity.
        param approval_id: The unique identifier of approval
        Returns: ApprovalItemRequestBuilder
        
msgraph/generated/identity_governance/privileged_access/group/assignment_approvals/assignment_approvals_request_builder.py