Differentiate parent line in the Outliner

With the new Outliner in 2.91, I feel that it became less clear when an object is parented to another. I propose 3 possibilities to put a difference between the line of collections and the line of parenting:

1- Reintroduce the previous style only for parenting.

2- Reintroduce plus have the line dashed.

3- Dashed line with the current style.