workflowHandle 
  open fun <Res> workflowHandle(workflowName: String, workflowId: String, resTypeTag: TypeTag<Res>): Client.WorkflowHandle<Res>
Create a new WorkflowHandle for the provided workflow name and identifier.
Return
the workflow handle
Parameters
workflowName 
the workflow name
workflowId 
the workflow identifier
resTypeTag  
type tag used to deserialize the invocation result