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 /*
  * Copyright (C) 2011 The Guava Authors
  *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
  * in compliance with the License. You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software distributed under the
 * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 * express or implied. See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.google.common.collect;
A local balancing policy for modified nodes in binary search trees.

Parameters:
<N> The type of the nodes in the trees that this BstRebalancePolicy can rebalance.
Author(s):
Louis Wasserman
interface BstBalancePolicy<N extends BstNode<?, N>> {
  
Constructs a locally balanced tree around the key and value data in source, and the subtrees left and right. It is guaranteed that the resulting tree will have the same inorder traversal order as the subtree left, then the entry source, then the subtree right.
  N balance(BstNodeFactory<N> nodeFactory, N source, @Nullable N left, @Nullable N right);

  
Constructs a locally balanced tree around the subtrees left and right. It is guaranteed that the resulting tree will have the same inorder traversal order as the subtree left, then the subtree right.
  N combine(BstNodeFactory<N> nodeFactory, @Nullable N left, @Nullable N right);
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