merge function

Service merge(
  1. Service existing,
  2. Service incoming
)

Merges two Service by overwriting existing attributes where new values are incoming.

Implementation

Service merge(Service existing, Service incoming) => Service(
    name: incoming.name ?? existing.name,
    type: incoming.type ?? existing.type,
    host: incoming.host ?? existing.host,
    port: incoming.port ?? existing.port,
    txt: incoming.txt ?? existing.txt,
    addresses: incoming.addresses ?? existing.addresses);