docs: public int[] makeBoneMap(GVRSkeleton srcskel, GVRSkeleton dstskel)
      {
          int numsrcbones = srcskel.getNumBones();
          int[] bonemap = new int[numsrcbones];
          GVRPose srcPose = srcskel.getBindPose();
          GVRPose dstPose = dstskel.getBindPose();
  
          for (int i = 0; i < numsrcbones; ++i)
          {
              int boneindex = -1;
              String bonename = srcskel.getBoneName(i);
  
              if (bonename != null)
              {
                  boneindex = dstskel.getBoneIndex(bonename);
              }
              bonemap[i] = boneindex;
              if (boneindex >= 0)
              {
                  Log.w("BONE", "%s\n%d: %s\n%d: %s",
                          bonename, i, srcPose.getBone(i).toString(),
                          boneindex, dstPose.getBone(boneindex).toString());
              }
              else
              {
                  Log.w("GVRPoseMapper", "makeBoneMap: cannot find bone " + bonename);
              }
          }
          return bonemap;
      }