Merge pull request #362 from cunarist/add-dart-doc-comments

Add doc comments for `DartSignal` and `RustSignal` fields

flutter_ffi_plugin/lib/src/interface.dart

@@ -10,7 +10,13 @@ typedef HandleRustSignal = void Function(int, Uint8List, Uint8List);
 /// This type is generic, and the message
 /// can be of any type declared in Protobuf.
 class RustSignal<T> {
-  T message;
-  Uint8List binary;
+  /// The message instance of a class generated by Protobuf.
+  final T message;
+
+  /// Binary data included in the signal.
+  /// This field is useful for sending custom bytes
+  /// without the overhead of serialization/deserialization.
+  final Uint8List binary;
+
   RustSignal(this.message, this.binary);
 }

rust_crate/src/interface.rs

@@ -10,7 +10,11 @@ use super::interface_web::*;
 /// This type is generic, and the message
 /// can be of any type declared in Protobuf.
 pub struct DartSignal<T> {
+    /// The message instance of a struct generated by Protobuf.
     pub message: T,
+    /// Binary data included in the signal.
+    /// This field is useful for sending custom bytes
+    /// without the overhead of serialization/deserialization.
     pub binary: Vec<u8>,
 }