From 86cf34af4d65ecd7a4e3b7097d799a882e230771 Mon Sep 17 00:00:00 2001
From: softprops <d.tangren@gmail.com>
Date: Sun, 3 Jan 2016 11:12:32 -0500
Subject: improve builder interface

---
 src/builder.rs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/builder.rs b/src/builder.rs
index e16858e..242ad49 100644
--- a/src/builder.rs
+++ b/src/builder.rs
@@ -120,19 +120,19 @@ impl<'a, 'b, 'c> EventsBuilder<'a, 'b, 'c> {
     }
 
     /// Filter events since a given timestamp
-    pub fn since(mut self, ts: &'b u64) -> EventsBuilder<'a, 'b, 'c> {
+    pub fn since(&mut self, ts: &'b u64) -> &mut EventsBuilder<'a, 'b, 'c> {
         self.since = Some(ts);
         self
     }
 
     /// Filter events until a given timestamp
-    pub fn until(mut self, ts: &'c u64) -> EventsBuilder<'a, 'b, 'c> {
+    pub fn until(&mut self, ts: &'c u64) -> &mut EventsBuilder<'a, 'b, 'c> {
         self.until = Some(ts);
         self
     }
 
     /// Returns an interator over streamed docker events
-    pub fn build(mut self) -> Result<Box<Iterator<Item = Event>>> {
+    pub fn build(&self) -> Result<Box<Iterator<Item = Event>>> {
         let mut params = Vec::new();
         if let Some(s) = self.since {
             params.push(format!("since={}", s));
-- 
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