imports:
    - { source: 'dev/config.yml', if: { '${env:envname}': 'dev' } }

port: '${env:server_port|12}'
address: '${env:server_address|"0.0.0.0"}'

foo:
    bar: 3
    foobar: '${local:foo.bar}'

barfoo:
    foo:
        bar: '${config:name:bar.foo}'
        fooo: '${env:envname}'
        barbar: '${const:foobarconst}'