[feature request] Method for prune tree or subsample tree by a list of node name?

[y9c]

                                 /-1.0, A
                     /1.0, D1.0, C
               /1.0, F           \-1.0, B
              |     |
         /1.0, H     \-1.0, E
        |     |
-0.0, root     \-1.0, G
        |
        |      /-1.0, I
         \1.0, K
               \-1.0, J

---

         /-1.0, G
-1.0, root
         \-4.0, B

[leonardbinet]

@yech1990 I understand the title, but I'm not sure to understand your example, could you provide more details about it?