lib: Add a more-convenient API to add multiple lines to the same module.
lib: Add a more-convenient API to add multiple lines to the same module.

emilio/rust-bindgen,emilio/rust-bindgen,emilio/rust-bindgen,rust-lang/rust-bindgen,rust-lang/rust-bindgen,emilio/rust-bindgen,rust-lang/rust-bindgen,rust-lang/rust-bindgen,emilio/rust-bindgen