From 3a347cc1f676f523b3ce0375fcaa808804923222 Mon Sep 17 00:00:00 2001
From: cavemanloverboy <caveycool@gmail.com>
Date: Wed, 13 Dec 2023 10:11:50 -0800
Subject: [PATCH] finish writing comment...

---
 lang/src/lib.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lang/src/lib.rs b/lang/src/lib.rs
index dcb1ab7061..963759c208 100644
--- a/lang/src/lib.rs
+++ b/lang/src/lib.rs
@@ -272,7 +272,8 @@ pub trait InstructionData: Discriminator + AnchorSerialize {
     }
     /// Clears `vec` and writes instruction data to it
     ///
-    /// We use a Vec<u8> here because of the additional flexibility
+    /// We use a Vec<u8> here because of the additional flexibility of re-allocation (only if necessary),
+    /// and because the data field in `Instruction` expects a `Vec<u8>`.
     fn write_to(&self, mut vec: &mut Vec<u8>) {
         // Clear vector
         vec.clear();