export declare namespace StringUtil {
    /**
     * Returns a string, truncated as needed, of length limit or less. When
     * truncated, appends "…".
     */
    function ellipsize(str: string, limit: number): string;
    /** Converts the first character of str to uppercase. */
    function capitalize<T extends string>(str: T): Capitalize<T>;
    /** Returns true if string is nullish, empty, or whitespace-only. */
    function isBlank(str: string | undefined | null): boolean;
    /**
     * Converts an unknown type to a verbose stacktrace if an error or string form
     * otherwise.
     */
    function caughtToString(val: unknown, preferredErrorProperty?: 'stack' | 'message' | 'name'): string;
    /**
     * Converts an unknown type to a verbose stacktrace if an error or string form
     * otherwise. Prefer caughtToString where possible for typing reasons.
     */
    function caughtToStringUntyped(val: unknown, preferredErrorProperty?: string): string;
}
//# sourceMappingURL=StringUtil.d.ts.map