class ElasticAPM::GRPC::ClientInterceptor

def span_context(call)
  peer = call.instance_variable_get(:@wrapped)&.peer
  return unless peer
  split_peer = URI.split(peer)
  destination = ElasticAPM::Span::Context::Destination.new(
    address: split_peer[0],
    port: split_peer[6],
    service: { type: TYPE, name: SUBTYPE, resource: peer }
  )
  ElasticAPM::Span::Context.new(destination: destination)
end