HTMLElement.rootElement is deprecated.

[hakamaq]

The contents of atom-text-editor elements are no longer encapsulated
within a shadow DOM boundary. Please, stop using rootElement and access
the editor contents directly instead.

HTMLElement.rootElement (/Applications/Atom.app/Contents/Resources/app/src/text-editor-element.js:23:10)
HTMLElement.initialize (/Users/me/.atom/packages/livestyle-atom/lib/analyzer/widget/LiveStyleWidget.js:28:31)
SelectorWidget.decorate (/Users/me/.atom/packages/livestyle-atom/lib/analyzer/widget/AbstractWidget.js:64:42)
SelectorWidget.show (/Users/me/.atom/packages/livestyle-atom/lib/analyzer/widget/AbstractWidget.js:123:41)
SelectorWidget.disposable.add.onCursorEnter (/Users/me/.atom/packages/livestyle-atom/lib/analyzer/widget/SelectorWidget.js:25:26)
Function.module.exports.Emitter.simpleDispatch (<embedded>:63943:20)