diff --git a/guava/src/com/google/common/collect/UnmodifiableIterator.java b/guava/src/com/google/common/collect/UnmodifiableIterator.java
index <HASH>..<HASH> 100644
--- a/guava/src/com/google/common/collect/UnmodifiableIterator.java
+++ b/guava/src/com/google/common/collect/UnmodifiableIterator.java
@@ -23,6 +23,10 @@ import java.util.Iterator;
 /**
  * An iterator that does not support {@link #remove}.
  *
+ * <p>{@code UnmodifiableIterator} is used primarily in conjunction with implementations of
+ * {@link ImmutableCollection}, such as {@link ImmutableList}. You can, however, convert an existing
+ * iterator to an {@code UnmodifiableIterator} using {@link Iterators#unmodifiableIterator}.
+ *
  * @author Jared Levy
  * @since 2.0
  */
Give people who have never used UnmodifiableIterator before a hint.
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Created by MOE: <URL>