/**
 * 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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