/// <summary>
/// Starts the child workflow, returning an <see cref="IAsyncFuture"/> that can be used
/// to wait for the workflow to complete. This version doesn't return a workflow result.
/// </summary>
/// <param name="args">The workflow arguments.</param>
/// <returns>An <see cref="ChildWorkflowFuture"/> that can be used to retrieve the workflow result as an <c>object</c>.</returns>
/// <exception cref="InvalidOperationException">Thrown if the child workflow has already been started.</exception>
/// <remarks>
/// <note>
/// <b>IMPORTANT:</b> You need to take care to ensure that the parameters passed
/// are compatible with the target workflow arguments.
/// </note>
/// </remarks>
public async Task <ChildWorkflowFuture> StartAsync(params object[] args)
{
await SyncContext.Clear;
Covenant.Requires <ArgumentNullException>(args != null, nameof(args));
if (childExecution != null)
{
throw new InvalidOperationException("Cannot start a future stub more than once.");
}
childExecution = await client.StartChildWorkflowAsync(parentWorkflow, WorkflowTypeName, CadenceHelper.ArgsToBytes(client.DataConverter, args), Options);
// Create and return the future.
return(new ChildWorkflowFuture(parentWorkflow, childExecution));
}
