1 files changed, 3 insertions, 0 deletions
diff --git a/java/com/google/android/libraries/mobiledatadownload/file/openers/WriteStringOpener.java b/java/com/google/android/libraries/mobiledatadownload/file/openers/WriteStringOpener.java
index 9c2a98c..2c8fd8f 100644
--- a/java/com/google/android/libraries/mobiledatadownload/file/openers/WriteStringOpener.java
+++ b/java/com/google/android/libraries/mobiledatadownload/file/openers/WriteStringOpener.java
@@ -19,6 +19,7 @@ import com.google.android.libraries.mobiledatadownload.file.Behavior;
 import com.google.android.libraries.mobiledatadownload.file.OpenContext;
 import com.google.android.libraries.mobiledatadownload.file.Opener;
 import com.google.android.libraries.mobiledatadownload.file.common.internal.Charsets;
+import com.google.errorprone.annotations.CanIgnoreReturnValue;
 import java.io.IOException;
 import java.nio.charset.Charset;
 
@@ -36,11 +37,13 @@ public final class WriteStringOpener implements Opener<Void> {
     return new WriteStringOpener(string);
   }
 
+  @CanIgnoreReturnValue
   public WriteStringOpener withCharset(Charset charset) {
     this.charset = charset;
     return this;
   }
 
+  @CanIgnoreReturnValue
   public WriteStringOpener withBehaviors(Behavior... behaviors) {
     this.behaviors = behaviors;
     return this;