Function mock_compile_message 

pub fn mock_compile_message<A>(
    instruction: &Instruction,
    accounts: &[(Pubkey, A)],
    program_id: &Pubkey,
    loader_key: &Pubkey,
) -> (SanitizedMessage, Vec<(Pubkey, AccountSharedData)>)
where
    AccountSharedData: From<A>,
    A: Clone,