class ElasticAPM::Transport::Serializers::MetadataSerializer

def build_service(service)
  base =
    {
      name: keyword_field(service.name),
      environment: keyword_field(service.environment),
      version: keyword_field(service.version),
      agent: {
        name: keyword_field(service.agent.name),
        version: keyword_field(service.agent.version)
      },
      framework: {
        name: keyword_field(service.framework.name),
        version: keyword_field(service.framework.version)
      },
      language: {
        name: keyword_field(service.language.name),
        version: keyword_field(service.language.version)
      },
      runtime: {
        name: keyword_field(service.runtime.name),
        version: keyword_field(service.runtime.version)
      }
    }
  if (node_name = service.node_name)
    base[:node] = { name: keyword_field(node_name) }
  end
  base
end