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: gui.rs
    path of file: ./repos/headcrab/examples
    
    the code of the file until where you have to start completion: #[cfg(target_os = "linux")]
fn main() {
    example::main();
}

#[cfg(not(target_os = "linux"))]
fn main() {
    println!("This example is currently not supported for OSes other than Linux")
    
    fn patch_breakpoint_function(context: &mut HeadcrabContext) -> CrabResult<()> {
        context.load_debuginfo_if_necessary()?;
        // Test that `a_function` resolves to a function.
        let breakpoint_addr = context.debuginfo().get_symbol_address("breakpoint").unwrap() + 4 /* prologue */;
        // Write breakpoint to the `breakpoint` function.
        let mut pause_inst = 0 as libc::c_ulong;
        unsafe {
            context
                .remote()?
                .read()
                .read(&mut pause_inst, breakpoint_addr)
                .apply()
                .unwrap();
        }
        // pause (rep nop); ...
        assert_eq!(
            &pause_inst.to_ne_bytes()[0..2],
            &[0xf3, 0x90],
            "Pause instruction not found"
        );
        let mut breakpoint_inst = pause_inst.to_ne_bytes();
        // int3; nop; ...
        breakpoint_inst[0] = 0xcc;
        nix::sys::ptrace::write(
            context.remote()?.pid(),
            breakpoint_addr as *mut _,
            libc::c_ulong::from_ne_bytes(breakpoint_inst) as *mut _,
        )
        .unwrap();

        Ok(())
    }