/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/**
 * Consume result for push consumer.
 *
 * <p>Designed for push consumer specifically. This is a class-based result
 * (matching the Java client) so that it can be extended with suspend results.</p>
 */
export declare class ConsumeResult {
    /**
     * Consume message successfully.
     */
    static readonly SUCCESS: ConsumeResult;
    /**
     * Failed to consume message.
     */
    static readonly FAILURE: ConsumeResult;
    readonly name: string;
    protected constructor(name: string);
    toString(): string;
}
/**
 * Suspend consume result.
 *
 * <p>When returned by the message listener, the consumer will suspend
 * consumption of the current message (and related messages in FIFO mode)
 * for the specified duration by changing the invisible duration.</p>
 */
export declare class ConsumeResultSuspend extends ConsumeResult {
    readonly suspendTimeMs: number;
    private constructor();
    /**
     * Create a suspend result with the given suspend time in milliseconds.
     *
     * @param suspendTimeMs - Suspend time in milliseconds
     * @return {ConsumeResultSuspend} ConsumeResultSuspend instance
     * @throws {Error} if suspendTimeMs is less than 50ms
     */
    static of(suspendTimeMs: number): ConsumeResultSuspend;
    toString(): string;
}