1 files changed, 13 insertions, 0 deletions
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-12/src/lib.rs b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-12/src/lib.rs
new file mode 100644
index 000000000..afc759423
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-12/src/lib.rs
@@ -0,0 +1,13 @@
+mod front_of_house {
+    pub mod hosting {
+        pub fn add_to_waitlist() {}
+    }
+}
+
+use crate::front_of_house::hosting;
+
+mod customer {
+    pub fn eat_at_restaurant() {
+        hosting::add_to_waitlist();
+    }
+}