head
WrapperLowPriorityImplicits1
head1
Collapser
CollapserLowPriorityImplicits2
Expander
head2
Collapser
Expander
head3
Collapser
Expander
headH1
Collapser
Expander
headH2
CollapserLowPriorityImplicits2
Expander
headH3
CollapserLowPriorityImplicits2
Expander