Created mixin for geologist pick usage method.

src/main/java/dev/micle/geologistpicktweaks/mixin/IGMineralTestingItemMixin.java

@@ -0,0 +1,22 @@
+package dev.micle.geologistpicktweaks.mixin;
+
+import com.igteam.immersivegeology.common.item.IGMineralTestingItem;
+import dev.micle.geologistpicktweaks.GeologistPickTweaks;
+import net.minecraft.world.InteractionResult;
+import net.minecraft.world.item.context.UseOnContext;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Overwrite;
+
+@Mixin(IGMineralTestingItem.class)
+public abstract class IGMineralTestingItemMixin {
+    /**
+     * @author Micle
+     * @reason Improving geologist pick usage logic.
+     */
+    @Overwrite
+    public InteractionResult useOn(UseOnContext context) {
+        GeologistPickTweaks.LOGGER.debug("HELLO WORLD");
+
+        return InteractionResult.SUCCESS;
+    }
+}

src/main/resources/geologist_pick_tweaks.mixins.json

@@ -5,6 +5,7 @@
   "compatibilityLevel": "JAVA_8",
   "refmap": "geologist_pick_tweaks.refmap.json",
   "mixins": [
+    "IGMineralTestingItemMixin"
   ],
   "client": [
   ],