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layout: stdlib-reference
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# interface IMutatingFunc\<TR, each TP\>

## Description

Represents an interface for a mutating function that can take multiple parameters.
The function allows to modify the state of the object it belongs to.


## Generic Parameters

####  <a id="typeparam-TR"></a>TR
####  <a id="typeparam-TP"></a>TP

## Methods

* [operator\(\)](operatorx28x29)


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