Method add

crates/kernel_cmdline/src/utf8.rs:171–173

Add a parameter to the command line if it doesn't already exist Returns `Action::Added` if the parameter did not already exist and was added. Returns `Action::Existed` if the exact parameter (same key and value) already exists. No modification was made. Unlike `add_or_modify`, this method will not modify existing parameters. If a parameter with the same key exists but has a different value, the

(&mut self, param: &Parameter)

    /// different value, the new parameter is still added, allowing
    /// duplicate keys (e.g., multiple `console=` parameters).
    pub fn add(&mut self, param: &Parameter) -> Action {
        self.0.add(&param.0)
    }

    /// Add or modify a parameter to the command line
    ///