class Sorbet::Private::ConstantLookupCache

def all_module_names
  ret = @all_constants.select {|_k, v| Sorbet::Private::RealStdlib.real_is_a?(v.const, Module)}.map do |_key, struct|
    raise "should never happen" if !struct.primary_name
    struct.primary_name
  end
  ret
end