first 1.11.1 attempt

src/main/java/com/sosnitzka/taiga/traits/TraitUncertain.java

@@ -1,9 +1,14 @@
 package com.sosnitzka.taiga.traits;
 
+import net.minecraft.item.ItemStack;
+import net.minecraft.util.NonNullList;
 import net.minecraft.util.text.TextFormatting;
 import net.minecraftforge.common.MinecraftForge;
+import slimeknights.mantle.util.RecipeMatch;
 import slimeknights.tconstruct.library.traits.AbstractTrait;
 
+import java.util.Optional;
+
 
 public class TraitUncertain extends AbstractTrait {
 
@@ -12,4 +17,9 @@ public class TraitUncertain extends AbstractTrait {
         super(TraitUncertain.class.getName().toLowerCase().substring(4), TextFormatting.RED);
         MinecraftForge.EVENT_BUS.register(this);
     }
+
+    @Override
+    public Optional<RecipeMatch.Match> matches(NonNullList<ItemStack> stacks) {
+        return null;
+    }
 }