Function select_installers 

pub(crate) fn select_installers<'installer, 'name>(
    supplied_bin_names: &[&'name str],
    parallel_installers: &'installer [Box<dyn Installer + 'installer>],
    managed_cargo_installers: &'installer [Box<dyn Installer + 'installer>],
) -> (Vec<&'installer dyn Installer>, Vec<&'installer dyn Installer>, Vec<&'name str>)

Select individual installers or expand the cargo selector group.