1. DomName('Plugin.namedItem')
  2. DocsEditable()
MimeType namedItem(String name)

Source 

@DomName('Plugin.namedItem')
@DocsEditable()
MimeType namedItem(String name) => wrap_jso(_blink.BlinkPlugin.instance.namedItem_Callback_1_(unwrap_jso(this), name));