/**
 * Compares strings in a case-sensitive ordinal way.
 * The comparison is based on the values of the UTF-16 code units (not Unicode code points) they contain.
 * @see [MDN - Less than (<)](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Less_than#description)
 */
export declare function compareStringOrdinal(x: string | undefined, y: string | undefined): number;
export declare function compareStringOrdinalIgnoreCase(x: string | undefined, y: string | undefined): number;
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