unmap method
Unmap from this instance the pair domNode and element.
Implementation
bool unmap(DOMNode domNode, T element) {
final elementToDOMNodeMap = _elementToDOMNodeMap;
if (elementToDOMNodeMap == null) return false;
var prev = elementToDOMNodeMap.getKeyFromValue(domNode);
if (prev == element) {
elementToDOMNodeMap.remove(prev);
return true;
}
return false;
}