Add field access condition override example

test/MergeInject.java

@@ -1,20 +1,24 @@
 import dev.w1zzrd.asm.InjectClass;
 import dev.w1zzrd.asm.Inject;
-import dev.w1zzrd.asm.Merger;
 
 @InjectClass(value = MergeTest.class)
 public class MergeInject implements Runnable {
 
+    // Dummy field
+    String s;
+
     @Inject
     public String test(){
-        System.out.println(Merger.field("s"));
+        System.out.println(s);
         return "Modified";
     }
 
     @Override
     @Inject
     public void run() {
-        for (int i = 0; i < 5; ++i)
+        for (int i = 0; i < 5; ++i) {
+            s = s + "!";
             System.out.println(test());
+        }
     }
 }

test/MergeTest.java

@@ -1,10 +1,10 @@
 public class MergeTest {
 
-    private String s = "Hello";
+    private final String s;
 
 
     public MergeTest(){
-
+        s = "Hello";
     }
 
     public MergeTest(String s) {