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: mod.rs
    path of file: ./repos/LibAFL/libafl/src/executors/hooks
    
    the code of the file until where you have to start completion: //! Hooks for the executors.
//! These will be executed right before and after the executor's harness run.

use crate::executors::HasObservers;

/// windows crash/timeout handle
    
    fn init_all<E, S>(&mut self, _state: &mut S) {}
    fn pre_exec_all<EM, I, S, Z>(
        &mut self,
        _fuzzer: &mut Z,
        _state: &mut S,
        _mgr: &mut EM,
        _input: &I,
    ) {
    }
    fn post_exec_all<EM, I, S, Z>(
        &mut self,
        _fuzzer: &mut Z,
        _state: &mut S,
        _mgr: &mut EM,
        _input: &I,
    ) {
    }
}