Test fixes / Building module presence saving

core/src/mindustry/world/blocks/production/GenericCrafter.java

@@ -39,7 +39,7 @@ public class GenericCrafter extends Block{
 
     public DrawBlock drawer = new DrawBlock();
     /** If set, the icon is overridden to be these strings, in order. Each string is a suffix. */
-    public String[] iconOverride = null;
+    public @Nullable String[] iconOverride = null;
 
     public GenericCrafter(String name){
         super(name);

core/src/mindustry/world/consumers/Consumers.java

@@ -62,6 +62,10 @@ public class Consumers{
         return add(new ConsumeLiquid(liquid, amount));
     }
 
+    public ConsumeLiquids liquids(LiquidStack... stacks){
+        return add(new ConsumeLiquids(stacks));
+    }
+
     /**
      * Creates a consumer which directly uses power without buffering it.
      * @param powerPerTick The amount of power which is required each tick for 100% efficiency.