1. DomName('SVGPathElement.createSVGPathSegLinetoHorizontalRel')
  2. DocsEditable()
PathSegLinetoHorizontalRel createSvgPathSegLinetoHorizontalRel(num x)

Source 

@DomName('SVGPathElement.createSVGPathSegLinetoHorizontalRel')
@DocsEditable()
PathSegLinetoHorizontalRel createSvgPathSegLinetoHorizontalRel(num x) => _blink.BlinkSVGPathElement.instance.createSVGPathSegLinetoHorizontalRel_Callback_1_(this, x);