Function maybe_mangle_name

crates/codegen/src/symboltable.rs:2815–2826

Selective mangling for type parameter scopes around generic classes. If `mangled_names` is Some, only mangle names that are in the set; other names are left unmangled.

(
    class_name: Option<&str>,
    mangled_names: Option<&IndexSet<String>>,
    name: &'a str,
)

/// If `mangled_names` is Some, only mangle names that are in the set;
/// other names are left unmangled.
pub(crate) fn maybe_mangle_name<'a>(
    class_name: Option<&str>,
    mangled_names: Option<&IndexSet<String>>,
    name: &'a str,
) -> Cow<'a, str> {
    if let Some(set) = mangled_names
        && !set.contains(name)
    {
        return name.into();
    }
    mangle_name(class_name, name)
}