export declare class LambdaDogStatsD {
    private static readonly HOST;
    private static readonly PORT;
    private static readonly MIN_SEND_BUFFER_SIZE;
    private static readonly ENCODING;
    private static readonly SOCKET_TYPE;
    private static readonly TAG_RE;
    private static readonly TAG_SUB;
    private static readonly MAX_FLUSH_TIMEOUT;
    private readonly socket;
    private readonly pendingSends;
    constructor();
    /**
     * Send a distribution value, optionally setting tags and timestamp.
     * Timestamp is seconds since epoch.
     */
    distribution(metric: string, value: number, timestamp?: number, tags?: string[]): void;
    private normalizeTags;
    private report;
    private send;
    /** Block until all in-flight sends have settled */
    flush(): Promise<void>;
}
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