src/test/resources/recursive/no-children-1-pretty.yaml

&id001 !!org.yaml.snakeyaml.recursive.Human {
  bankAccountOwner: *id001,
  birthPlace: Leningrad,
  birthday: !!timestamp '1970-01-12T13:46:40Z',
  children: !!set {
    },
  father: null,
  mother: null,
  name: Father,
  partner: {
    bankAccountOwner: *id001,
    birthPlace: Saint-Petersburg,
    birthday: !!timestamp '1973-03-03T09:46:40Z',
    children: !!set {
      },
    father: null,
    mother: null,
    name: Mother,
    partner: *id001
  }
}