/**
 * @module adaptive-expressions
 */
/**
 * Copyright (c) Microsoft Corporation. All rights reserved.
 * Licensed under the MIT License.
 */
import { ExpressionEvaluator } from '../expressionEvaluator';
/**
 * Return a timestamp in the specified format from UNIX time (also know as Epoch time, POSIX time, UNIX Epoch time).
 */
export declare class FormatEpoch extends ExpressionEvaluator {
    /**
     * Initializes a new instance of the [FormatEpoch](xref:adaptive-expressions.FormatEpoch) class.
     */
    constructor();
    /**
     * @private
     */
    private static evaluator;
    /**
     * @private
     */
    private static validator;
}
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