anchor.diff:          | SrcLang of string
           | SrcSet of string
           | Start of float
  -        | Step of U2<float, string>
  +        | Step of obj
           | Summary of string
           | TabIndex of float
           | Target of string
           | Title of string
           | Type of string
           | UseMap of string
  -        | Value of U2<string, ResizeArray<string>>
  -        | Width of U2<float, string>
  +        | Value of string
  +        | Width of obj
           | Wmode of string
           | Wrap of string
           | About of string
  
positive.code: 
      type SVGAttr =
          | ClipPath of string
          | Cx of U2<float, string>
          | Cy of U2<float, string>
          | D of string
          | Dx of U2<float, string>
          | Dy of U2<float, string>
          | Fill of string
          | FillOpacity of U2<float, string>
          | FontFamily of string
          | FontSize of U2<float, string>
          | Fx of U2<float, string>
          | Fy of U2<float, string>
          | GradientTransform of string
          | GradientUnits of string
          | MarkerEnd of string
          | MarkerMid of string
          | MarkerStart of string
          | Offset of U2<float, string>
          | Opacity of U2<float, string>
          | PatternContentUnits of string
          | PatternUnits of string
          | Points of string
          | PreserveAspectRatio of string
          | R of U2<float, string>
          | Rx of U2<float, string>
          | Ry of U2<float, string>
          | SpreadMethod of string
          | StopColor of string
          | StopOpacity of U2<float, string>
          | Stroke of string
          | StrokeDasharray of string
          | StrokeLinecap of string
          | StrokeMiterlimit of string
          | StrokeOpacity of U2<float, string>
          | StrokeWidth of U2<float, string>
          | TextAnchor of string
          | Transform of string
          | Version of string
          | ViewBox of string
          | Width of U2<float, string>
          | X1 of U2<float, string>
          | X2 of U2<float, string>
          | X of U2<float, string>
          | XlinkActuate of string
          | XlinkArcrole of string
          | XlinkHref of string
  
negative.code:         | XmlBase of string
          | XmlLang of string
          | XmlSpace of string
          | Y1 of obj
          | Y2 of obj
          | Y of obj
          interface IProp
  
      type CSSProp =
  