# File lib/deltacloud/drivers/rhevm/rhevm_driver.rb, line 88
  def realms(credentials, opts={})
    client = new_client(credentials)
    realm_arr = []
    safely do
      realm_arr = client.clusters.collect do |r|
        convert_realm(r, client.datacenter(r.datacenter.id))
      end
    end
    realm_arr = filter_on( realm_arr, :id, opts )
    realm_arr
  end