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/rudroid/code/src/core/unicorn
    
    the code of the file until where you have to start completion: pub mod arch;
pub mod ffi;
pub mod unicorn_const;

use libc::c_void;
use xmas_elf::header;

use crate::utilities;
use super::rudroid::Emulator;
use arch::arm64;
use unicorn_const::{Arch, uc_error, MemRegion, Protection, HookType, MemType, Qu
    
    pub fn context_init(&self) -> Result<Context, uc_error> {
        let mut new_context: ffi::uc_context = Default::default();
        let err = unsafe { ffi::uc_context_alloc(self.uc, &mut new_context) };
        if err != uc_error::OK {
            return Err(err);
        }
        let err = unsafe { ffi::uc_context_save(self.uc, new_context) };
        if err == uc_error::OK {
            Ok(Context { context: new_context })
        } else {
            unsafe { ffi::uc_free(new_context) };
            Err(err)
        }
    }