/**
 * Detects if string has a valid font size unit in it
 * @param value
 * @returns true it encounters a valid font size unit, otherwise false
 */
export declare const hasFontSizeUnit: (value: string | number) => boolean;
/**
 * Checks if the value is a valid font size unit
 * @param value the string or number value to check
 * @returns boolean if true, the value is a valid font size unit
 */
export declare const isValidFontSizeUnit: (value: string | number) => boolean;