You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: cli.rs
    path of file: ./repos/namada/crates/apps/src/lib
    
    the code of the file until where you have to start completion: //! The CLI commands that are re-used between the executables `namada`,
//! `namada-node` and `namada-client`.
//!
//! The `namada` executable groups together the most commonly used commands
//! inlined from the node and the client. The o
    
        fn def(app: App) -> App {
            app.arg(
                ALIAS.def().help(
                    "An alias to be associated with the payment address.",
                ),
            )
            .arg(ALIAS_FORCE.def().help(
                "Override the alias without confirmation if it already exists.",
            ))
            .arg(VIEWING_KEY.def().help("The viewing key."))
            .arg(PIN.def().help(
                "Require that the single transaction to this address be \
                 pinned.",
            ))
        }