Can't mock Option<&str> without an explicit lifetime name

[olvyko]

Can't mock trait with Option<&str> without an explicit lifetime name:

#[cfg(test)]
mod tests {
    use mockall::*;

    #[automock]
    pub trait Mailer {
        fn send(&self, email: Option<&str>);
    }
}

Error:

error[E0637]: `&` without an explicit lifetime name cannot be used here
  --> modules\user\src\services\entry\usecase.rs:32:38
   |
32 |         fn send(&self, email: Option<&str>);
   |                                      ^ explicit lifetime name needed here

error[E0106]: missing lifetime specifier
  --> modules\user\src\services\entry\usecase.rs:32:38
   |
32 |         fn send(&self, email: Option<&str>);
   |                                      ^ expected lifetime parameter

[asomers]

Duplicate of #61 .