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: contract.rs
    path of file: ./repos/kani/kani-compiler/src/codegen_cprover_gotoc/codegen
    
    the code of the file until where you have to start completion: // Copyright Kani Contributors
// SPDX-License-Identifier: Apache-2.0 OR MIT
use crate::codegen_cprover_gotoc::GotocCtx;
use crate::kani_middle::attributes::KaniAttributes;
use cbmc::goto_program::FunctionContract;
use cbmc::goto_program::Lambda;
use kani_metadata::AssignsContract;
use rustc_hir::def_id::DefId as InternalDefId;
use rustc_smir::rustc_internal;
use stable_mir::mir::m
    
    pub fn attach_modifies_contract(&mut self, instance: Instance, modified_places: Vec<Local>) {
        // This should be safe, since the contract is pretty much evaluated as
        // though it was the first (or last) assertion in the function.
        assert!(self.current_fn.is_none());
        let body = instance.body().unwrap();
        self.set_current_fn(instance, &body);
        let goto_contract = self.codegen_modifies_contract(modified_places);
        let name = self.current_fn().name();

        self.symbol_table.attach_contract(name, goto_contract);
        self.reset_current_fn()
    }