[source, ruby]
----
response = client.search(
  body: {
    query: {
      bool: {
        must: {
          match: {
            body: 'elasticsearch'
          }
        },
        should: {
          rank_feature: {
            field: 'pagerank',
            saturation: {
              pivot: 10
            }
          }
        }
      }
    }
  }
)
puts response
----
