Task origin track from a class

["Rego, P." <pvrego@gmail.com>]

I have a class Def_Class which defines a record which is a task. Say:
	task type My_Task_Kind;
	
	type Def_Class is tagged limited
		record
			Some_Element : Integer; -- or other type anyway
			My_Task : My_Task_Kind;
		end record;
		
and I want to access my class inside the task body, something like
	type body My_Task_Kind (Origin: Def_Class) is
	begin
		if Origin.Some_Element = 1 then
			(...)
		end if;
	end My_Task_Kind;

So how can I do it? (I tried to use an entry type, but got problems with limited/non limited types, so asking for help!!)