Add an API Helper to ChestGUI to allow inplace updating of the stack that was clicked.

src/main/java/dev/zontreck/libzontreck/util/BlocksUtil.java

@@ -0,0 +1,29 @@
+package dev.zontreck.libzontreck.util;
+
+import dev.zontreck.libzontreck.vectors.Vector3;
+import net.minecraft.server.level.ServerLevel;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Contains helper functions for block position calculations
+ */
+public class BlocksUtil
+{
+    /**
+     * Gathers a list of positions for like-blocks in a vein. This can accept a limit of -1, but has a hard cap at 512 blocks
+     * @param level The level to find the vein in
+     * @param start Starting position for vein
+     * @param limit The applicable limit for vein detection
+     * @return List of positions for the vein
+     */
+    public static List<Vector3> VeinOf(ServerLevel level, Vector3 start, int limit)
+    {
+        List<Vector3> ret = new ArrayList<>();
+
+
+
+        return ret;
+    }
+}