open-eggbert-java/src/main/resources/META-INF/native-image/serialization-config.json

{
  "types":[
    {
      "name":"com.almasb.fxgl.core.serialization.Bundle"
    },
    {
      "name":"java.lang.String"
    },
    {
      "name":"java.util.HashMap"
    }
  ],
  "lambdaCapturingTypes":[
  ],
  "proxies":[
  ]
}