/**
 * @module botbuilder-m365
 */
/**
 * Copyright (c) Microsoft Corporation. All rights reserved.
 * Licensed under the MIT License.
 */
import { TurnContext } from 'botbuilder';
import { TurnState } from '../TurnState';
import { Block, BlockTypes } from './Block';
/**
 * @private
 */
export declare class VarBlock extends Block {
    private static readonly Prefix;
    readonly name: string;
    constructor(content: string);
    get type(): BlockTypes;
    isValid(): {
        valid: boolean;
        error?: string;
    };
    render(context: TurnContext, state: TurnState): string;
    static formatValue(value: any): string;
    static hasVarPrefix(text: string): boolean;
    static isValidVarName(text: string): boolean;
    private varName;
    private caseInsensitiveFindValue;
}
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