/**
 * Convert a module specifier for use with dynamic `import()`.
 *
 * Absolute filesystem paths must be `file://` URLs when `import()` is a real
 * ESM import — on Windows a bare `C:\...` path is parsed as a `c:` protocol
 * scheme and rejected with `ERR_UNSUPPORTED_ESM_URL_SCHEME`.
 *
 * Bob's CJS build rewrites `import()` to `require()`, which needs a filesystem
 * path (not a `file://` URL). Detect CJS via `__filename` and leave absolute
 * paths unchanged there. Bare package / relative specifiers are always unchanged.
 *
 * @internal
 */
export declare function toImportSpecifier(specifier: string): string;