/**
 *
 * Copyright 2020-2026 Splunk Inc.
 *
 * Licensed 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
 *
 * https://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.
 *
 */
import { ReadableSpan, SpanProcessor } from '@opentelemetry/sdk-trace-base';
export type SpanEventType = string;
type SpanEventListener = (span: ReadableSpan) => void;
export declare class SpanEmitterProcessor implements SpanProcessor {
    private buffer;
    private isEnabled;
    private listeners;
    addEventListener(type: SpanEventType, listener: SpanEventListener): void;
    emitSpan(span: ReadableSpan, phase: 'start' | 'end'): void;
    enable(): void;
    forceFlush(): Promise<void>;
    onEnd(span: ReadableSpan): void;
    onStart(span: ReadableSpan): void;
    removeEventListener(type: SpanEventType, listener: SpanEventListener): void;
    shutdown(): Promise<void>;
}
export {};