add options to configure deserialization of ProtoQueueMessage

src/ProtoQueueMessage.js

@@ -13,18 +13,22 @@ class ProtoQueueMessage extends QueueMessage {
     return this.ContentSchema.encode(message).finish()
   }
 
+  static getUnserializeOptions () {
+    return {
+      enums: String, // enums as string names
+      longs: Number, // longs as numbers
+      bytes: Buffer, // bytes as base64 encoded strings
+      defaults: true, // includes default values
+      arrays: true, // populates empty arrays (repeated fields) even if defaults=false
+      objects: true, // populates empty objects (map fields) even if defaults=false
+      oneofs: true // includes virtual oneof fields set to the present field's name
+    }
+  }
+
   static unserialize (buffer, ContentSchema) {
     try {
       const message = ContentSchema.decode(buffer)
-      const data = ContentSchema.toObject(message, {
-        enums: String, // enums as string names
-        longs: Number, // longs as strings (requires long.js)
-        bytes: Buffer, // bytes as base64 encoded strings
-        defaults: true, // includes default values
-        arrays: true, // populates empty arrays (repeated fields) even if defaults=false
-        objects: true, // populates empty objects (map fields) even if defaults=false
-        oneofs: true // includes virtual oneof fields set to the present field's name
-      })
+      const data = ContentSchema.toObject(message, this.getUnserializeOptions())
 
       return new ProtoQueueMessage('ok', data, null, ContentSchema)
     } catch (err) {