Function.extractParams is deprecated.

[brandrichmedia]

Assigning custom properties to a marker when creating/copying it is
deprecated. Please, consider storing the custom properties you need in
some other object in your package, keyed by the marker's id property.

Function.extractParams (<embedded>:131698:20)
MarkerLayer.markRange (<embedded>:74798:77)
DisplayMarkerLayer.markBufferRange (<embedded>:132318:58)
TextEditor.markBufferRange (<embedded>:4161:44)
Object.createMarker (/Users/999/.atom/packages/web-accessibility-checker/lib/web-accessibility-checker.coffee:87:23)
Object.scanLabel (/Users/999/.atom/packages/web-accessibility-checker/lib/web-accessibility-checker.coffee:244:27)