implemented method call

example/data/list.mc

@@ -0,0 +1,37 @@
+// Constructor.
+fn List() {
+    let result = {
+        data: [],
+        push: (self, item) => {
+            push(self.data, item);
+        },
+        pop: (self) => {
+            return pop(self.data);
+        },
+        len: (self) => {
+            return len(self.data);
+        }
+    };
+
+    return result;
+}
+
+// Instantiation.
+let list = List();
+print("new list", list);
+
+// Pushing 5 items in a loop.
+let index = 0;
+loop {
+    if (index >= 5) break;
+    list.push(index);
+    index = index + 1;
+}
+
+print("pushed list", list);       // Misc accesses.
+print("length list", list.len()); // Misc accesses.
+print("poped item", list.pop());  // Misc accesses.
+print("poped list", list);        // Misc accesses.
+
+print("list.data", list.data);
+print("list[\"data\"]", list["data"]);