SynchronizedOverlay.ts TypeError: can't access property lastChild

[MathieuB1]

Hi Team,

Can you please ensure that this function is robust by adding this change? Dont know what's the impact on existing test cases.

File: SynchronizedOverlay.ts

 * @param {Node} node The node to remove the children from.
 */
function removeChildren(node: Node) {
  while (node.lastChild) {
    node.removeChild(node.lastChild);
  }
}

Error:

removeChildren - SynchronizedOverlay.ts:22:9
TypeError: can't access property "lastChild", node is null

Fix Proposal:

function removeChildren(node: Node) {
  if (!node) {
    return;
  }
  while (node.lastChild) {
    node.removeChild(node.lastChild);
  }
}

Many thanks in advance!