feat: update structure

cs2030s/labs/Lab4/Applicable.java

@@ -0,0 +1,14 @@
+/**
+ * The Applicable interface that can probably
+ * transform if given something that is
+ * probably an Immutator.
+ * Contains a single abstract method apply.
+ * CS2030S Lab 4
+ * AY22/23 Semester 1
+ * 
+ * @author Yadunand Prem (10B)
+ */
+
+interface Applicable<T> {
+  <R> Applicable<R> apply(Probably<? extends Immutator<? extends R, ? super T>> probablyImmutator);
+}