API issue , No "path " in return of GET /projects/:id/repository/tree

according to the doc https://docs.gitlab.com/ce/api/repositories.html
there is “path” field
here is my return , but without “path”
[{“id”:“9d1dcfdaf1a6857c5f83dc27019c7600e1ffaff8”,“name”:“N9000”,“type”:“tree”,“mode”:“040000”},{“id”:“e7a24d00d2dd5fe6b2f8eb9d5823e532634bd75b”,“name”:“N8000”,“type”:“tree”,“mode”:“040000”},{“id”:“23442dc97a49890afcafdb375f9b1d304ca1b175”,“name”:“UtilityLibraries”,“type”:“tree”,“mode”:“040000”},{“id”:“04bbfd9b057137bf3b1bc3921e72ee5e83ed5863”,“name”:“README.md”,“type”:“blob”,“mode”:“100644”}]