Design guidelines on vertical divider in list item

I am trying to figure out when to put a vertical divider in my Material Design list item (esepcially with switch element).

I cant find the dimensions/specs/when to use a vertical divider.

I find screenshots of it in the material guidelines here:

• https://material.io/guidelines/patterns/settings.html#settings-labels-secondary-text
  • image: https://storage.googleapis.com/material-design/publish/material_v_12/assets/0B1PhAWhtrRTrVTRldFh1WEY3QUU/settings-switch5.png
• https://material.io/guidelines/patterns/notifications.html#notifications-settings
  • image: https://storage.googleapis.com/material-design/publish/material_v_12/assets/0BwJzNNZmsTcKaU5rVHZyT2R4eFE/notifications-settings-01-channels.png

But no specs on this. Does anyone know where to find official specs on this?