workflowstep security macro?

is there any macro for WorkflowStep security?

for example i want to say :

{% Document.WorkflowStep.CanUserApprove(/*probably some parameters*/) %}
OR
{% WorkflowStep.CurrentUserAllowedToApprove(/*...*/) %}
OR in the field macro editor (for enable or disable form fields)
{%EditedObject.WorkflowStep.CanUserApprove(/*...*/)%}