-2. All fields in message structures, except callbacks and extensions.
- (Beginning with nanopb-0.2.4, in earlier versions the field sizes are partially unchecked.)
+2. All fields in message structures, except:
+
+ - callbacks (*pb_callback_t* structures)
+ - pointer fields (malloc support) and *_count* fields for pointers
+ - extensions (*pb_extension_t* structures)