Link benchmarked function to report output

[ChosunOne]

Is there a way to include a link to the function that is benched by a criterion benchmark run? I want to build some tools that will display performance of functions in my editor, but I don't want to have to rely on naming my benchmark with the path:line or fully qualified function name.

Given the function I want to bench:

fn foo(in: &str) -> usize {
    in.len()
}

and the corresponding benchmark:

fn foo_benchmark(c: &mut Criterion) {
    let example_in = "Some example data";
    c.bench_function("my descriptive benchmark name", |b| b.iter(|| foo(black_box(example_in))));
}

In the .json report I would like a way to link the benchmark result with the benched function:

{
"function": "fully::qualified::path::to::foo",
}

or

{
"function": "path/to/mod/with/foo:line_no",
}

If it can't be done now, it would be nice if in the benchmark I could explicitly register the function I want to associate with the bench, perhaps like:

fn foo_benchmark(c: &mut Criterion) {
    let example_in = "Some example data";
    c.bench_function("my descriptive benchmark name", |b| b.iter(|| foo(black_box(example_in))));
    c.register(foo) // Or maybe in the line above somehow
}