Slim hologram

src/de/steamwar/lobby/display/Hologram.java

@@ -89,17 +89,15 @@ public class Hologram implements ConfigurationSerializable {
     private final String id;
     private final Location location;
     private final String text;
-    private final boolean persistent;
 
     public Hologram(Map<String, Object> map) {
-        this((String) map.get("id"), (Location) map.get("location"), (String) map.get("text"), true);
+        this((String) map.get("id"), (Location) map.get("location"), (String) map.get("text"));
     }
 
-    public Hologram(String id, Location location, String text, boolean persistent) {
+    public Hologram(String id, Location location, String text) {
         this.id = id;
         this.location = location;
         this.text = text;
-        this.persistent = persistent;
         entityId = entityIds--;
 
         spawnLiving = spawnLivingPacketConstructor.invoke();
@@ -115,7 +113,7 @@ public class Hologram implements ConfigurationSerializable {
 
         display = new Displayable(location, this::show, this::hide);
 
-        if(persistent)
+        if(id != null)
             holograms.add(this);
     }
 
@@ -150,7 +148,7 @@ public class Hologram implements ConfigurationSerializable {
 
     public void delete() {
         display.delete();
-        if(persistent)
+        if(id != null)
             holograms.remove(this);
     }
 }