feat: update structure

cs2030s/labs/Lab4/Immutatorable.java

@@ -0,0 +1,13 @@
+/**
+ * The Immutatorable interface that can
+ * transform when given something that is
+ * Immutator.
+ * Contains a single abstract method transform.
+ * CS2030S Lab 4
+ * AY22/23 Semester 1
+ * @author Yadunand Prem (10B)
+ */
+
+interface Immutatorable<T> {
+  public <R> Immutatorable<R> transform(Immutator<? extends R, ? super T> immutator);
+}