app/helpers/application_helper/button/miq_ae_domain_unlock.rb
class ApplicationHelper::Button::MiqAeDomainUnlock < ApplicationHelper::Button::MiqAeDomain
needs :@record
def disabled?
@error_message = _('Domain is Unlocked.') if super
@error_message.present?
end
def visible?
super || @record.unlockable?
end
end