org.danielnixon.saferdom.implicits.html
The active document of the object element's nested browsing context, if any; otherwise null.
The active document of the object element's nested browsing context, if any; otherwise null.
MDN
The object element's form owner, or null if there isn't one.
The object element's form owner, or null if there isn't one.
MDN
https://html.spec.whatwg.org/multipage/embedded-content.html#the-object-element