code: function flattenDepth(array, depth) {
        var length = array == null ? 0 : array.length;
        if (!length) {
          return [];
        }
        depth = depth === undefined$1 ? 1 : toInteger(depth);
        return baseFlatten(array, depth);
      }
docs: Recursively flatten `array` up to `depth` times.
  
  @static
  @memberOf _
  @since 4.4.0
  @category Array
  @param {Array} array The array to flatten.
  @param {number} [depth=1] The maximum recursion depth.
  @returns {Array} Returns the new flattened array.
  @example
  
  var array = [1, [2, [3, [4]], 5]];
  
  _.flattenDepth(array, 1);
  // => [1, 2, [3, [4]], 5]
  
  _.flattenDepth(array, 2);
  // => [1, 2, 3, [4], 5]