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node_modules/@fluentui/utilities/lib-commonjs/extendComponent.d.ts

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+import * as React from 'react';
+/**
+ * Extends a component's lifetime methods by appending new functions to the existing lifetime functions.
+ */
+export declare function extendComponent<T extends React.Component>(parent: T, methods: {
+    [key in keyof T]?: T[key];
+}): void;