```ruby
module MiqAeMethodService
  class MiqAeServiceExtManagementSystem < MiqAeServiceModelBase
    expose :storages,       :association => true
    expose :hosts,          :association => true
    expose :vms,            :association => true
    expose :ems_events,     :association => true
    expose :ems_clusters,   :association => true
    expose :ems_folders,    :association => true
    expose :resource_pools, :association => true
    expose :tenant,         :association => true
    expose :to_s
    expose :authentication_userid
    expose :authentication_password
    expose :authentication_password_encrypted
    expose :refresh, :method => :refresh_ems
    expose :provider, :association => true
  end
end
```

Add method Available_Images to populate image dropdown box
user
```ruby
module MiqAeMethodService
  class MiqAeServiceExtManagementSystem < MiqAeServiceModelBase
    expose :storages,       :association => true
    expose :hosts,          :association => true
    expose :vms,            :association => true
    expose :ems_events,     :association => true
    expose :ems_clusters,   :association => true
    expose :ems_folders,    :association => true
    expose :resource_pools, :association => true
    expose :tenant,         :association => true
    expose :miq_templates,  :association => true
    expose :to_s
    expose :authentication_userid
    expose :authentication_password
    expose :authentication_password_encrypted
    expose :refresh, :method => :refresh_ems
    expose :provider, :association => true
  end
end
```
assistant