protoreflect: fix list example code
Change-Id: I2c8afba104ae97be5e575226a47f6a7f20198abe
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/431798
Reviewed-by: Nicolas Hillegeer <aktau@google.com>
diff --git a/reflect/protoreflect/value_union.go b/reflect/protoreflect/value_union.go
index ca8e28c..08e5ef7 100644
--- a/reflect/protoreflect/value_union.go
+++ b/reflect/protoreflect/value_union.go
@@ -54,11 +54,11 @@
// // Append a 0 to a "repeated int32" field.
// // Since the Value returned by Mutable is guaranteed to alias
// // the source message, modifying the Value modifies the message.
-// message.Mutable(fieldDesc).(List).Append(protoreflect.ValueOfInt32(0))
+// message.Mutable(fieldDesc).List().Append(protoreflect.ValueOfInt32(0))
//
// // Assign [0] to a "repeated int32" field by creating a new Value,
// // modifying it, and assigning it.
-// list := message.NewField(fieldDesc).(List)
+// list := message.NewField(fieldDesc).List()
// list.Append(protoreflect.ValueOfInt32(0))
// message.Set(fieldDesc, list)
// // ERROR: Since it is not defined whether Set aliases the source,
