Add new message to support collection of model-type bindings for OOP workers (#88) (#89)

src/proto/FunctionRpc.proto

@@ -431,6 +431,7 @@ message TypedData {
     CollectionDouble collection_double = 10;
     CollectionSInt64 collection_sint64 = 11;
     ModelBindingData model_binding_data = 12;
+    CollectionModelBindingData collection_model_binding_data = 13;
   }
 }
 
@@ -669,3 +670,8 @@ message ModelBindingData
     // The binding data content
     bytes content = 4;
 }
+
+// Used to encapsulate collection model_binding_data
+message CollectionModelBindingData {
+  repeated ModelBindingData model_binding_data = 1;
+}