/**
 * Error subclass to use when the source has not been modified.
 *
 * @param {String} message optional "message" property to set
 * @api protected
 */
export default class NotModifiedError extends Error {
    constructor(message) {
        super(message ||
            'Source has not been modified since the provied "cache", re-use previous results');
        this.code = 'ENOTMODIFIED';
    }
}
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