In 10.2.5 I was able to create a FeatureLayer with a selectionSymbol which made it possible to create a solid thick border on the selected feature. In version 100.x I'm only able to set .selectionColor and .selectionWidth.
How can I create the selection effect I want in 100.x?
My users should be able to pick multiple existing features and create a new one based on the selected ones. While selecting it is important that the users see the selections clearly.