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(arr, counter = [], depth = 1) {
      counter.push(depth);
      for (let elem of arr) {
        if (Array.isArray(elem)) {
          this.calculateDepth(elem, counter, depth + 1);
        }
      }  
      return Math.max(...counter);
     }
  }
  