Mocking external generic struct

[MrCasCode]

Hi,

I have this struct in my module

pub struct LiquidityMapBuilder<'a, T: TransportTrait> {
    contract: &'a Contract<T>,
    tick_spacing: i32
}

Contract is a generic struct from an exernal crate web3::contract::Contract

I've tried mocking the struct as:

#[cfg(test)]
trait TransportTrait : Transport + Send + Sync + 'static {}
#[cfg(not(test))]
trait TransportTrait : Transport + Send + Sync {}

#[cfg(test)]
mod mock {
    use super::*;
    use mockall::mock;
    mock! {
        pub Contract <T: TransportTrait>{
            pub fn query<R, A, B, P>(
                &self,
                func: &str,
                params: P,
                from: A,
                options: Options,
                block: B,
            ) -> impl Future<Output = Result<R>> + '_
            where
                R: Detokenize + 'static,
                A: Into<Option<Address>> + 'static,
                B: Into<Option<BlockId>> + 'static,
                P: Tokenize + 'static;
        }
    }
}

#[cfg(test)]
use mock::MockContract as Contract;
#[cfg(not(test))]
use web3::contract::Contract;

From what I've been reading adding the ' static is mandatory for now #217. The problem is that this that now the functions return types don't match because R has a 'static lifetime in the tests. If I don't make it static then I have the problem of not living long enough.

How could I deal with this issue? Being an external crate I can't modify the code to change the return types depending of if testing or not