goog.dom.appendChild documentation lists incorrect type

[rome-user]

See the following page https://google.github.io/closure-library/api/goog.dom.html#appendChild

The parameters parent and child are both listed as Node | null. However, the implementation of the function tells a different story.

closure-library/closure/goog/dom/dom.js

Lines 1258 to 1264 in 5918355

	goog.dom.appendChild = function(parent, child) {
	'use strict';
	goog.asserts.assert(
	parent != null && child != null,
	'goog.dom.appendChild expects non-null arguments');
	parent.appendChild(child);
	};

[shicks]

Strictly speaking, this is correct. In practice, we've found it impossible to fix all of these incorrect nullability issues because of the mountain of legacy code that depends on them.