anchor.diff:                  | IsCentered
                   | Props of IHTMLProp list
                   | CustomClass of string
  +                | Modifiers of IModifier list
   
               type internal Options =
                   { IsCentered : bool
                     Props : IHTMLProp list
  -                  CustomClass : string option }
  +                  CustomClass : string option
  +                  Modifiers : string option list }
                   static member Empty =
                       { IsCentered = false
                         Props = []
  -                      CustomClass = None }
  +                      CustomClass = None
  +                      Modifiers = [] }
   
           /// Generate <a class="card-header-icon"></a>
           let icon (options: GenericOption list) children =
               let opts = genericParse options
  -            let classes = Helpers.classes Classes.Header.Icon [opts.CustomClass] []
  +            let classes = Helpers.classes Classes.Header.Icon (opts.CustomClass::opts.Modifiers) []
               a (classes::opts.Props) children
   
           /// Generate <p class="card-header-title"></p>
  
positive.code:         /// Generate <a class="card-footer-item"></a>
          let item (options: GenericOption list) children =
              let opts = genericParse options
              let classes = Helpers.classes Classes.Footer.Item [opts.CustomClass] []
              a (classes::opts.Props) children
  
negative.code:     /// Generate <div class="card"></div>
      let card (options: GenericOption list) children =
          let opts = genericParse options
          let classes = Helpers.classes Classes.Container (opts.CustomClass::opts.Modifiers) []
          div (classes::opts.Props) children
  
      /// Generate <div class="card-header"></div>
      let header (options: GenericOption list) children =
          let opts = genericParse options
          let classes = Helpers.classes Classes.Header.Container (opts.CustomClass::opts.Modifiers) []
          header (classes::opts.Props) children
  
      /// Generate <div class="card-content"></div>
      let content (options: GenericOption list) children =
          let opts = genericParse options
          let classes = Helpers.classes Classes.Content (opts.CustomClass::opts.Modifiers) []
          div (classes::opts.Props) children
  
      /// Generate <div class="card-footer"></div>
      let footer (options: GenericOption list) children =
          let opts = genericParse options
          let classes = Helpers.classes Classes.Footer.Container (opts.CustomClass::opts.Modifiers) []
          footer (classes::opts.Props) children
  
      module Header =
  