module ActionMailer
module ActionMailer::DeliveryMethods
module ActionMailer::DeliveryMethods::ClassMethods
module ActionMailer::MailHelper
module ActionMailer::Previews
module ActionMailer::Previews::ClassMethods
module ActionMailer::TestCase::Behavior
module ActionMailer::TestCase::Behavior::ClassMethods
module ActionMailer::TestHelper
module ActionMailer::VERSION
module Rails
module Rails::Generators
class ActionMailer::Base
class ActionMailer::Base::LateAttachmentsProxy
class ActionMailer::Base::NullMail
class ActionMailer::Collector
class ActionMailer::DeliveryJob
class ActionMailer::LogSubscriber
class ActionMailer::MessageDelivery
class ActionMailer::NonInferrableMailerError
class ActionMailer::Preview
class ActionMailer::Railtie
class ActionMailer::TestCase
class ApplicationMailer
class Rails::Generators::MailerGenerator
actionmailer
4.2.1
# exists?
def exists?(preview) all.any?{ |p| p.preview_name == preview } end