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: analysis_target.rs
    path of file: ./repos/rustig/lib/panic_analysis/src/marker
    
    the code of the file until where you have to start completion: // (C) COPYRIGHT 2018 TECHNOLUTION BV, GOUDA NL

// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

use AnalysisOptions;
use RustigCallGraph;

use callgraph::Context;

use marker::CodeMarker;

/// Imp
    
    fn mark_code(&self, call_graph: &RustigCallGraph, context: &Context) {
        let indices = call_graph.graph.node_indices();

        // Loop over all entry points, and map to their respective crates
        let crates = indices
            .map(|index| call_graph.graph[index].borrow())
            .filter(|node| node.attributes.entry_point.get())
            .map(|node| node.defining_crate.name.to_owned())
            .collect::<Vec<_>>();

        // Use default implementation to mark all analysis target functions
        DefaultPanicAnalysisTargetMarker { crates }.mark_code(&call_graph, &context)
    }