How to use the durable-functions.getClient function in durable-functions

module.exports = async function (context, req) {
    const client = df.getClient(context);
    const instanceId = await client.startNew(req.params.functionName, undefined, req.body);

    context.log(`Started orchestration with ID = '${instanceId}'.`);

    return client.createCheckStatusResponse(context.bindingData.req, instanceId);
};

module.exports = async function (context, req) {
    const client = df.getClient(context);
    const instanceId = await client.startNew(req.params.functionName, undefined, req.body);

    context.log(`Started orchestration with ID = '${instanceId}'.`);

    const timeoutInMilliseconds = getTimeInSeconds(req, timeout) || 30000;
    const retryIntervalInMilliseconds = getTimeInSeconds(req, retryInterval) || 1000;

    const response = client.waitForCompletionOrCreateCheckStatusResponse(
        context.bindingData.req,
        instanceId,
        timeoutInMilliseconds,
        retryIntervalInMilliseconds);
    return response;
};

module.exports = async function (context, req) {
    const client = df.getClient(context);
    const instanceId = await client.startNew(req.params.functionName, undefined, req.body);

    context.log(`Started orchestration with ID = '${instanceId}'.`);

    return client.createCheckStatusResponse(context.bindingData.req, instanceId);
};

module.exports = async function(context) {  
  
  const client = df.getClient(context);
  const instanceId = await client.startNew('Orchestrator',  undefined, 'Nuget');

  context.log(`Started orchestration with ID = '${instanceId}'.`);

  return client.createCheckStatusResponse(context.bindingData.req, instanceId);
}

module.exports = async function (context, srcBlob) {
    const client = df.getClient(context),
          name = context.bindingData.name,
          length = srcBlob.length;

    //context.log("name:", name, " size:", length);
    
    const instanceId = await client.startNew("renderPipeline", undefined, name);
    
    //context.log("orchestrator:", instanceId);

    return client.createCheckStatusResponse(name, instanceId)
};