Can I tweak score based on facet field and query?

main.rs

//! This example shows searching for recipes by providing a set of ingredients available.
//! In this example I would like Fried egg to have a higher score than Egg rolls because all
//! of the ingredients required for Fried egg are satisfied.
use tantivy::collector::TopDocs;
use tantivy::query::BooleanQuery;
use tantivy::schema::*;
use tantivy::{doc, Index, DocId, SegmentReader, Score};

fn main() {
    let mut schema_builder = Schema::builder();

    let title = schema_builder.add_text_field("title", TEXT | STORED);
    let ingredient = schema_builder.add_facet_field("ingredient");

    let schema = schema_builder.build();
    let index = Index::create_in_ram(schema.clone());

    let mut index_writer = index.writer(30_000_000).unwrap();

    index_writer.add_document(doc!(
        title => "Fried egg",
        ingredient => Facet::from("/ingredient/egg"),
        ingredient => Facet::from("/ingredient/oil"),
    ));
    index_writer.add_document(doc!(
        title => "Scrambled egg",
        ingredient => Facet::from("/ingredient/egg"),
        ingredient => Facet::from("/ingredient/butter"),
        ingredient => Facet::from("/ingredient/milk"),
        ingredient => Facet::from("/ingredient/salt"),
    ));
    index_writer.add_document(doc!(
        title => "Egg rolls",
        ingredient => Facet::from("/ingredient/egg"),
        ingredient => Facet::from("/ingredient/garlic"),
        ingredient => Facet::from("/ingredient/salt"),
        ingredient => Facet::from("/ingredient/oil"),
        ingredient => Facet::from("/ingredient/tortilla-wrap"),
        ingredient => Facet::from("/ingredient/mushroom"),
    ));
    index_writer.commit().unwrap();

    let reader = index.reader().unwrap();
    let searcher = reader.searcher();
    {
        let query = BooleanQuery::new_multiterms_query(vec![
            Term::from_facet(ingredient, &Facet::from_text("/ingredient/egg")),
            Term::from_facet(ingredient, &Facet::from_text("/ingredient/oil")),
            Term::from_facet(ingredient, &Facet::from_text("/ingredient/garlic")),
            Term::from_facet(ingredient, &Facet::from_text("/ingredient/mushroom")),
        ]);

        let top_docs_collector = TopDocs::with_limit(2);
        let top_docs = searcher.search(&query, &top_docs_collector).unwrap();

        let titles: Vec<String> = top_docs
            .iter()
            .map(|(_, doc_id)| {
                searcher
                    .doc(*doc_id)
                    .unwrap()
                    .get_first(title)
                    .unwrap()
                    .text()
                    .unwrap()
                    .to_owned()
            })
            .collect();
        assert_eq!(titles, vec!["Fried egg", "Egg rolls"]);
    }
}