Function implicit_imports_for 

pub fn implicit_imports_for(
    module: &AIRModule,
    public_symbols: &HashMap<String, String>,
    own_path: &str,
) -> Vec<(String, String)>

Compute the implicit cross-module imports for module: public symbols declared in other reachable modules that module references but neither declares locally nor imports explicitly. Returns (module_path, name) pairs.

“References” is a conservative structural scan of the module’s debug rendering for the symbol name as a quoted identifier token (mirroring the Python / ESM equivalents). It can only over-import a name the program does not really use — harmless on Rust (a dead use is allow-ed by the crate-level #![allow(unused_imports)]) — never under-import, so it cannot reintroduce the unresolved reference it exists to fix.