---
ntp:
  config:
    enabled: bool()
    ntp-source-address: str()
  servers:
    "192.168.1.1": include('ntp_servers')
    "192.168.1.2": include('ntp_servers')
---
ntp_servers:
  config: include('ntp_servers_config')
ntp_servers_config:
  port: int(min=123, max=123)
  version: int(min=2, max=3)
  prefer: bool()
  address: str()
