type AppendResults = {
    contents: string;
    didClear: boolean;
    didAppend: boolean;
};
/**
 * Append a new item to the bottom of the original file and add a generated header.
 *
 * @param src contents of the original file
 * @param newSrc new content to append into the original file
 * @param tag used to update and remove merges
 * @param comment comment style `//` or `#`
 */
export declare function appendContents({ src, tag, comment, newSrc, }: {
    src: string;
    tag: string;
    comment: string;
    newSrc: string;
}): AppendResults;
export {};