export declare const NSStreamSocketSecurityLevel: {
    readonly None: "kCFStreamSocketSecurityLevelNone";
    readonly SSLv2: "kCFStreamSocketSecurityLevelSSLv2";
    readonly SSLv3: "kCFStreamSocketSecurityLevelSSLv3";
    readonly TLSv1: "kCFStreamSocketSecurityLevelTLSv1";
    readonly NegotiatedSSL: "kCFStreamSocketSecurityLevelNegotiatedSSL";
};
export type NSStreamSocketSecurityLevel = typeof NSStreamSocketSecurityLevel[keyof typeof NSStreamSocketSecurityLevel];
