Add support for generics (#20)

* wip

* .

* method

* TT

* TT

* .

* .

* mp

src-examples/ProxyInterfaceConsumer/PersonT.cs

@@ -0,0 +1,12 @@
+namespace ProxyInterfaceConsumer
+{
+    public class PersonT<T> where T: struct
+    {
+        public T TVal { get; set; }
+
+        public T Call(int x, T t)
+        {
+            return default;
+        }
+    }
+}