class GdsApi::PublishingApiV2

def get_linked_items(content_id, params = {})

Other tags:
    See: https://github.com/alphagov/publishing-api/blob/master/doc/api.md#get-v2linkedcontent_id - 
def get_linked_items(content_id, params = {})
  query = query_string(params)
  validate_content_id(content_id)
  get_json("#{endpoint}/v2/linked/#{content_id}#{query}")
end