code: function setArrayIndexAt(arr, dimensions, val, data) {
      var currentDimension = dimensions[0].execute(data);
      data.validate(currentDimension, 'number');
      currentDimension -= 1;
      if (currentDimension < 0) currentDimension = 0;
  
      if (arr.length <= currentDimension) throw new Error('Invalid array bounds');
      var item = arr[currentDimension];
      if (dimensions.length > 1) {
          if (!Array.isArray(item)) throw new Error('Invalid array dimensions');
          return setArrayIndexAt(arr[currentDimension], dimensions.slice(1), val,  data);
      } else arr[currentDimension] = val;
  }
docs: Sets the array item at a certain index, including multiple dimensions
  
  @param {Array} arr The array to search
  @param {Array<ExpressionStatement>} dimensions An array of indexes
  @param {String|Number} val The value to put in the array
  @param {ExecutionContext} data The execution data context
  @private