export type ExactModuleSourceReader = (path: string, byteLimit: number) => Promise<Uint8Array>;
/**
 * Read one module source through an exact byte-boundary and decode it as strict
 * UTF-8. Callers must provide the secured exact reader;
 * an unbounded compatibility read is never accepted.
 */
export declare function readBoundedModuleSource(readWithinLimit: ExactModuleSourceReader | undefined, path: string, maxBytes?: number): Promise<string>;
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