Full:
    █
 1. ├─f(NULL) %>% g(list(.)) %>% h(3, ., list(.))
 2. └─rlang:::h(3, ., list(.))

Collapsed:
    █
 1. ├─[ f(NULL) %>% g(list(.)) %>% h(3, ., list(.)) ]
 2. └─rlang:::h(3, ., list(.))

Branch:
 1. f(NULL) %>% g(list(.)) %>% h(3, ., list(.))
 2. rlang:::h(3, ., list(.))
