Properties with different keys fail

[binshi]

Combining Features with two different property formats fails with type mismatch error

Error:(183, 56) type mismatch; found : List[GeoJson.Geometry with Product with Serializable with GeoJson.Coords[Equals], _ >: XProperties with YProperties <: Product with Serializable]] required: Seq[GeoJson.Feature[G,P]] val featureCollection = GeoJson.FeatureCollection(features,

Also combing different geometries into a single FeatureCollection fails