PlatformHeadlessInAppWebView.implementation constructor
PlatformHeadlessInAppWebView.implementation()
Used by the platform implementation to create a new PlatformHeadlessInAppWebView.
Should only be used by platform implementations because they can't extend a class that only contains a factory constructor.
Implementation
@protected
PlatformHeadlessInAppWebView.implementation(this.params)
: super(token: _token);