From d5d55fd86981f66fcf8965b6e7dafbfafd2c90a5 Mon Sep 17 00:00:00 2001
From: Hiromu OCHIAI <otiai10@gmail.com>
Date: Sun, 18 Jun 2023 15:37:34 +0900
Subject: [PATCH] Update README

---
 README.md | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/README.md b/README.md
index dc66c4e..1cc8fc8 100644
--- a/README.md
+++ b/README.md
@@ -77,6 +77,15 @@ type Options struct {
 	// If zero, the internal default buffer of 32KB is used.
 	// See https://golang.org/pkg/io/#CopyBuffer for more information.
 	CopyBufferSize uint
+
+	// If you want to add some limitation on reading src file,
+	// you can wrap the src and provide new reader,
+	// such as `RateLimitReader` in the test case.
+	WrapReader func(src io.Reader) io.Reader
+
+	// If given, copy.Copy refers to this fs.FS instead of the OS filesystem.
+	// e.g., You can use embed.FS to copy files from embedded filesystem.
+	FS fs.FS
 }
 ```