How

core/src/mindustry/entities/comp/BuildingComp.java

@@ -2016,5 +2016,11 @@ abstract class BuildingComp implements Posc, Teamc, Healthc, Buildingc, Timerc,
         out.setCentered(x, y, block.size * tilesize, block.size * tilesize);
     }
 
+    @Override
+    @Replace
+    public String toString(){
+        return "Building#" + id() + "[" + tileX() + "," + tileY() + "]:" + block;
+    }
+
     //endregion
 }

core/src/mindustry/entities/comp/UnitComp.java

@@ -688,4 +688,10 @@ abstract class UnitComp implements Healthc, Physicsc, Hitboxc, Statusc, Teamc, I
         //deaths are synced; this calls killed()
         Call.unitDeath(id);
     }
+
+    @Override
+    @Replace
+    public String toString(){
+        return "Unit#" + id() + ":" + type;
+    }
 }

core/src/mindustry/world/blocks/defense/turrets/PayloadAmmoTurret.java

@@ -17,6 +17,7 @@ import mindustry.world.meta.*;
 import static mindustry.Vars.*;
 
 //TODO visuals!
+/** Do not use this class! */
 public class PayloadAmmoTurret extends Turret{
     public ObjectMap<UnlockableContent, BulletType> ammoTypes = new ObjectMap<>();