class RSpec::Core::ExampleGroup

def self.update_inherited_metadata(updates)
  metadata.update(updates) do |key, existing_group_value, new_inherited_value|
    @user_metadata.key?(key) ? existing_group_value : new_inherited_value
  end
  RSpec.configuration.configure_group(self)
  examples.each { |ex| ex.update_inherited_metadata(updates) }
  children.each { |group| group.update_inherited_metadata(updates) }
end