Cannot get tab stops which include choices

[Mark-hub-work]

I'm not sure if hypersnips is supposed to allow for this or not but in the VSCode snippets you can add choices or placeholders to your tab stops like this:

snippet hypertest "Will let you echo a field"
echo \$fields->render_field('${1:field_name}'
  [
    'type' => '${2|accordion,alignment_matrix,angle_picker,border,button_group,checkbox,color_picker,combo_box,date_picker,dimensions,field_group,file,gallery,gradient,hidden,number,radio,select,simple_dimension,switch,text,text_suggestion,textarea,wysiwyg'|}',
    ``rv= `field 1 has ${t[0].length} characters!` ``

endsnippet

But if I try to get the length of either of these tab stops their length will be 0. If I try to get the text from the tab stops they will be empty. If I change them to $1 and $2 they will work as intended.

So does hypersnips not support these kind of tab stops, or do you access them using some other syntax?