code: public void	setBoneMap(int[] bonemap)
      {
          GVRSkeleton	dstskel = mDestSkeleton;
          int			numbones;
  
          if (bonemap == null)
          {
              return;
          }
          if (dstskel == null)
          {
              return;
          }
          numbones = dstskel.getNumBones();
          if (numbones == 0)
          {
              return;
          }
          mBoneMap = bonemap;
      }
docs: Set the bone map between source and target.
  @param bonemap	bone mapping data
  
  The bone map specifies the source bone index for each
  target bone. The input should be an array of integers
  with an entry for each target skeleton bone.
  In the case where the target skeleton has a bone that is not in
  the source skeleton, the index should be -1.
  
  @see GVRSkeleton