private void initBtree(boolean initial) throws IOException {
    if (myBTree != null) {
      myBTree.doClose();
      myBTree = null;
    }
    myBTree = new IntToIntBtree(BTREE_PAGE_SIZE, indexFile(myFile), myCollisionResolutionStorage.getStorageLockContext(), initial);
  }
private void initBtree(boolean initial)