1. DomName('SVGGraphicsElement.hasExtension')
  2. DocsEditable()
  3. Experimental()
bool hasExtension(String extension)

Source 

@DomName('SVGGraphicsElement.hasExtension')
@DocsEditable()
@Experimental() // untriaged
bool hasExtension(String extension) => _blink.BlinkSVGGraphicsElement.instance.hasExtension_Callback_1_(this, extension);