You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: cancel_external.rs
    path of file: ./repos/sdk-core/tests/integ_tests/workflow_tests
    
    the code of the file until where you have to start completion: use temporal_client::WorkflowOptions;
use temporal_sdk::{WfContext, WorkflowResult};
use temporal_sdk_core_protos::coresdk::common::NamespacedWorkflowExecution;
use temporal_sdk_core_test_utils::CoreWfStarter;

const RECEIVER_WFID: &str = "sends-cancel-receiver";

async fn cancel_sender(ctx: WfContext) -> WorkflowResult<()> {
    let run_id = std::str::from_utf8(&ctx.get_args()[0].data)
        .unwrap()
        .to_owned();
    let sigres = ctx
        .cancel_external(NamespacedWorkflowExecution {
            workflow_id: RECEIVER_WFID.to_string(),
            run_id,
            namespace: ctx.namespace().to_string(),
        })
        .await;
    if ctx.get
    
async fn sends_cancel_to_other_wf() {
    let mut starter = CoreWfStarter::new("sends_cancel_to_other_wf");
    starter.no_remote_activities();
    let mut worker = starter.worker().await;
    worker.register_wf("sender", cancel_sender);
    worker.register_wf("receiver", cancel_receiver);

    let receiver_run_id = worker
        .submit_wf(
            RECEIVER_WFID,
            "receiver",
            vec![],
            WorkflowOptions::default(),
        )
        .await
        .unwrap();
    worker
        .submit_wf(
            "sends-cancel-sender",
            "sender",
            vec![receiver_run_id.into()],
            WorkflowOptions::default(),
        )
        .await
        .unwrap();
    worker.run_until_done().await.unwrap();
}