import { Pool } from 'pg';
import { PgConfig } from 'pg-env';
import { PgTestClient, PgTestClientOpts } from './test-client';
export declare class PgTestConnector {
    private static instance;
    private readonly clients;
    private readonly pgPools;
    private readonly seenDbConfigs;
    private readonly pendingConnects;
    private verbose;
    private shuttingDown;
    private constructor();
    static getInstance(verbose?: boolean): PgTestConnector;
    private poolKey;
    private dbKey;
    beginTeardown(): void;
    private registerConnect;
    private awaitPendingConnects;
    getPool(config: PgConfig): Pool;
    getClient(config: PgConfig, opts?: Partial<PgTestClientOpts>): PgTestClient;
    closeAll(): Promise<void>;
    close(): void;
    drop(config: PgConfig): void;
    kill(client: PgTestClient): Promise<void>;
}