class RSpec::Core::Configuration

def configure_group(group)
  modules = {
    :include => group.included_modules.dup,
    :extend  => group.ancestors.dup
  }
  include_or_extend_modules.each do |include_or_extend, mod, filters|
    next unless filters.empty? || group.apply?(:any?, filters)
    group.send(include_or_extend, mod)
  end
end