document.registerElement is deprecated
In Chrome version 70.0.3538.110 developer tools shows the following console message:
[Deprecation] document.registerElement is deprecated and will be removed in M73, around March 2019. Please use window.customElements.define instead. See https://www.chromestatus.com/features/4642138092470272 for more details.
I don't know what this is used for but is there any action we should be taking to treat this prior to March 2019? Will it affect anything at all? This appears to be used in out of the box code out of our control.