down() {
    checkPossibilityOfDynamicTraversal('down', this.solvedPath);

    if (!(this._get().data instanceof Array))
      throw Error('Baobab.Cursor.down: cannot go down on a non-list type.');

    return this.tree.select(this.solvedPath.concat(0));
  }
Method returning the child node of the cursor.

@return {Baobab} - The child cursor.