/**
 * Removes the prefix `prefix` from a string `s` with a graceful error handling.
 */
export declare function removePrefix(s: string, prefix: string): string;
export declare const enum IndentCommand {
    Preserve = 0,
    Indent = 1,
    Outdent = 2
}
/**
 * Analyze the change in the indentation level.
 *
 * # Examples
 *
 *  - `analyzeIndent("\t\t", "\t")` returns `Indent`. In this case, `indent`
 *    has a prefix `ref` and an extra character.
 *  - `analyzeIndent("\t", "\t\t")` returns `Outdent`. In this case, `indent`
 *    is a prefix of `ref` and is shorter than `ref`.
 *  - `analyzeIndent("\t\t", "\t\t")` returns `Preserve`.
 *  - `analyzeIndent("\t\t", " ")` returns `Outdent`. In this case, the common
 *    longest prefix of `indent` and `ref` is shorter than `ref`.
 */
export declare function analyzeIndent(indent: string, ref: string): IndentCommand;
export declare function escapeRegExp(x: string): string;
export declare function truncateStringWithEllipsisSign(x: string, len: number): string;