How to make elements nonLocatable when using EmphasizeElements api

[peiyanlu]

I tried using nonLocalable, but it doesn't seem to work

const emph = EmphasizeElements.getOrCreate(vp)
  emph.defaultAppearance = FeatureAppearance.fromJSON({
    ...FeatureAppearance.fromRgba(
      ColorDef.fromString(`rgba(255, 255, 255, ${ oversAlpha })`),
      true,
    ).toJSON(),
    nonLocatable: true,
  })
  
  emph.overrideElements(
    ids,
    vp,
    ColorDef.fromString(color),
    FeatureOverrideType.ColorAndAlpha,
    replace,
  )
  emph.emphasizeElements(ids, vp)