Added support for cloud functions that return ParseObjects

Author: phillwiggins

lib/src/enums/parse_enum_api_rq.dart

@@ -18,6 +18,7 @@ enum ParseApiRQ {
   destroy,
   all,
   execute,
+  executeObjectionFunction,
   upload,
   add,
   addAll,

lib/src/objects/parse_function.dart

@@ -26,4 +26,16 @@ class ParseCloudFunction extends ParseObject {
     var result = await _client.post(uri, body: json.encode(getObjectData()));
     return handleResponse(this, result, ParseApiRQ.execute, _debug, className);
   }
+
+  /// Executes a cloud function that returns a ParseObject type
+  ///
+  /// To add the parameters, create an object and call [set](value to set)
+  Future<ParseResponse> executeObjectFunction<T extends ParseObject>(
+      {Map parameters, Map headers}) async {
+    var uri = _client.data.serverUrl + "$_path";
+    if (parameters != null) setObjectData(parameters);
+    var result = await _client.post(uri, body: json.encode(getObjectData()));
+    return handleResponse<T>(
+        this, result, ParseApiRQ.executeObjectionFunction, _debug, className);
+  }
 }