${..} and @@..@@ runtime

Rather than a line by line execution it seems that within a region all ${..} expressions are resolved first, before the rest of the TEL is executed. This makes the following impossible:

@@Push(“TabIndex”, TemplateRepeatIndex)@@
@@Push(“TabId”, “Tab${TabIndex}”)@@

When ${TabIndex} is being resolved, the function source call to push this Item into the Package is not executed yet.