# `null_tree_node_update` Interface

A "null" node updater, indicating that no node updates are required.

Interface::Concepts::Null Policy Classes explains the concept of a null policy.

Defined in: `tree_policy.hpp`

## Template Parameters

Parameter | Description | Default Value

    class Const_Node_Iterator

Const node iterator type.

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    class Node_Iterator

Node iterator type.

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    class Cmp_Fn

Comparison functor.

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    class Allocator

Allocator type.

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