/// <summary>
/// Internal constructor.
/// </summary>
/// <param name="client">The associated client.</param>
/// <param name="methodName">
/// Optionally identifies the target workflow method by the name specified in
/// the <c>[WorkflowMethod]</c> attribute tagging the method. Pass a <c>null</c>
/// or empty string to target the default method.
/// </param>
/// <param name="options">Optional workflow options.</param>
internal WorkflowFutureStub(TemporalClient client, string methodName = null, StartWorkflowOptions options = null)
{
Covenant.Requires <ArgumentNullException>(client != null, nameof(client));
var workflowInterface = typeof(WorkflowInterface);
var method = TemporalHelper.GetWorkflowMethod(workflowInterface, methodName);
TemporalHelper.ValidateWorkflowInterface(workflowInterface);
this.client = client;
this.workflowTypeName = TemporalHelper.GetWorkflowTarget(workflowInterface, methodName).WorkflowTypeName;
this.options = StartWorkflowOptions.Normalize(client, options, workflowInterface, method);
}