Full:
    █
 1. ├─base::print(foo)
 2. └─rlang:::print.foo(foo)

Collapsed:
    █
 1. ├─[ base::print(...) ]
 2. └─rlang:::print.foo(foo)

Branch:
 1. base::print(foo)
 2. rlang:::print.foo(foo)
