/**
 * Get the [start, end] boundaries of each SDF entry in a string.
 *
 * Uses `indexOf` for fast splitting without regex overhead.
 * @param string - The full SDF string.
 * @param substring - The delimiter to search for (e.g. `'\n$$$$'`).
 * @param eol - The end-of-line character used to skip past the delimiter line.
 * @returns An array of `[start, end]` index pairs, one per SDF entry.
 */
export declare function getEntriesBoundaries(string: string, substring: string, eol: string): Array<[number, number]>;
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