[source, ruby]
----
response = client.indices.create(
  index: 'index',
  body: {
    settings: {
      index: {
        similarity: {
          my_similarity: {
            type: 'DFR',
            basic_model: 'g',
            after_effect: 'l',
            normalization: 'h2',
            "normalization.h2.c": '3.0'
          }
        }
      }
    }
  }
)
puts response
----
