ENH: Utility function to reset the grpc arena.

include/caosdb/protobuf_helper.h

@@ -41,6 +41,7 @@ namespace caosdb::utility {
 using google::protobuf::Arena;
 
 auto get_arena() -> Arena *;
+auto reset_arena() -> void;
 
 /**
  * Abstract wrapper class for Protobuf messages.

src/caosdb/protobuf_helper.cpp

@@ -30,4 +30,8 @@ auto get_arena() -> Arena * {
   return &arena;
 }
 
+auto reset_arena() -> void {
+  get_arena()->Reset();
+}
+
 } // namespace caosdb::utility