/**
 * Translator Registry — 参考 OmniRoute open-sse/translator/registry.ts
 *
 * 请求转换器: (model, body, stream?, credentials?) => unknown
 * 响应转换器: (chunk, state) => unknown[]
 */
export type RequestTranslator = (model: string, body: Record<string, unknown>, stream?: boolean, credentials?: Record<string, unknown> | null) => unknown;
export type ResponseTranslator = (chunk: Record<string, unknown>, state: Record<string, unknown>) => unknown[] | null;
/** 注册一对格式的转换器 */
export declare function register(from: string, to: string, requestFn?: RequestTranslator | null, responseFn?: ResponseTranslator | null): void;
/** 获取请求转换器 */
export declare function getRequestTranslator(from: string, to: string): RequestTranslator | undefined;
/** 获取响应转换器 */
export declare function getResponseTranslator(from: string, to: string): ResponseTranslator | undefined;
/** 判断是否需要转换 */
export declare function needsTranslation(from: string, to: string): boolean;
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