BootstrapComponents.Core.HtmlAttributes.this C# (CSharp) Метод

        public HtmlAttribute this[string attribute]
        {
            get { return _attributes.ContainsKey(attribute) ? _attributes[attribute].ToString() : null; }
            set
            {
                if (_attributes.ContainsKey(attribute))
                    _attributes[attribute] = value;
                else
                    _attributes.Add(attribute, value);
            }
        }