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	// @flow			// @flow

	import invariant from 'invariant';			import invariant from 'invariant';

	let canvas;			let canvas;

	declare var crypto: {
	getRandomValues<NumArray: $TypedArray>(typedArray: NumArray): NumArray,
	...
	};

	function calculateMaxTextWidth(			function calculateMaxTextWidth(
	texts: $ReadOnlyArray<string>,			texts: $ReadOnlyArray<string>,
	font: string,			font: string,
	): number {			): number {
	if (!canvas) {			if (!canvas) {
	canvas = document.createElement('canvas');			canvas = document.createElement('canvas');
	}			}
	const context = canvas.getContext('2d');			const context = canvas.getContext('2d');
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