instrumentation of chained method calls (builder pattern)

issue #58 : #58

VRL/VRL-Lang/src/test/resources/eu/mihosoft/vrl/lang/Instrumentation01.groovy

@@ -8,21 +8,22 @@ package my.testpackage;
 @eu.mihosoft.vrl.instrumentation.VRLVisualization
 public class MyFileClass {
 
-    public MyFileClass() {
-    }
-
-    public MyFileClass(int param1, int param2) {
+    private MyFileClass m(int a) {
+        println("m: " + a);
+        return this;
     }
 
     public static void main(String[] args) {
 
         int a = 2+3*2;
         int b = 5-a;
 
-        //MyFileClass mfc = new MyFileClass(a,b+1);
-
-        if (a<b) {
-            println("a<b: " + (a < b));
+        if (b<a) {
+            println("a<b: " + (b < a));
         }
+
+        MyFileClass mfc = new MyFileClass();
+
+        mfc.m(a).m(b)
     }
 }