text: import { NotImplementedError } from '../extensions/index.js';
  
  /**
   * Implement class DepthCalculator with method calculateDepth
   * that calculates deoth of nested array
   * 
   * @example
   * 
   * const depthCalc = new DepthCalculator();
   * depthCalc.calculateDepth([1, 2, 3, 4, 5]) => 1
   * depthCalc.calculateDepth([1, 2, 3, [4, 5]]) => 2
   * depthCalc.calculateDepth([[[]]]) => 3
   *
   */
  export default class DepthCalculator {
    calculateDepth = (a) => Array.isArray(a) ? 1 + Math.max(0, ...a.map(this.calculateDepth)) : 0;
  }
  