Create a package for studying module structuring

restaurant/Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "restaurant"
+version = "0.1.0"

restaurant/Cargo.toml

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+[package]
+name = "restaurant"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]

restaurant/src/lib.rs

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+mod front_of_house {
+    mod hosting {
+        fn add_to_waitlist() {}
+
+        fn seat_at_table() {}
+    }
+
+    mod serving {
+        fn take_order() {}
+
+        fn serve_order() {}
+
+        fn take_payment() {}
+    }
+}