Column Items Template Builder Class.
        /// <summary>
        /// Custom template of the in use property, controls how and what should be rendered in each cell of this column.
        /// It can be null.
        /// If you don't set it, new DisplayAsText() template will be used automatically.
        /// </summary>
        public void ColumnItemsTemplate(Action <ColumnItemsTemplateBuilder> columnItemsTemplateBuilder)
        {
            var builder = new ColumnItemsTemplateBuilder();

            columnItemsTemplateBuilder(builder);

            _pdfColumnAttributes.ColumnItemsTemplate = builder.ColumnItemsTemplate;
        }