25                   WalkOrder order) {  in walk()
29     if (order == WalkOrder::PreOrder)  in walk()
35     if (order == WalkOrder::PostOrder)  in walk()
41                   WalkOrder order) {  in walk()
45       if (order == WalkOrder::PreOrder)  in walk()
49       if (order == WalkOrder::PostOrder)  in walk()
56                   WalkOrder order) {  in walk()
57   if (order == WalkOrder::PreOrder)  in walk()
69   if (order == WalkOrder::PostOrder)  in walk()
104                         WalkOrder order) {  in walk()
108     if (order == WalkOrder::PreOrder) {  in walk()
120     if (order == WalkOrder::PostOrder) {  in walk()
132                         WalkOrder order) {  in walk()
136       if (order == WalkOrder::PreOrder) {  in walk()
146       if (order == WalkOrder::PostOrder) {  in walk()
159                         WalkOrder order) {  in walk()
160   if (order == WalkOrder::PreOrder) {  in walk()
180   if (order == WalkOrder::PostOrder)  in walk()