How to correctly check if a result set is ActiveRecord::Associations::CollectionProxy

Question

I want to check if my result set is of type ActiveRecord::Associations::CollectionProxy

for example my models are as follows

class Dashboard < ApplicationRecord
  has_and_belongs_to_many :organisations
end

class Organisation < ApplicationRecord
  has_and_belongs_to_many :dashboards
end

When i do organisation.dashboards i want to check if its ActiveRecord::Associations::CollectionProxy

but something like the below does not work.

expect(organisation.dashboards).to be(ActiveRecord::Associations::CollectionProxy)

Any help in this would be really great, Thanks.