/**
 * Returns true iff all chars are in ASCII range [0x00 .. 0x7f]
 *
 * @param x -
 */
export declare const isASCII: (x: string) => boolean;
/**
 * Returns true iff all chars are in printable ASCII range [0x20 .. 0x7e]
 *
 * @param x -
 */
export declare const isPrintableASCII: (x: string) => boolean;
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