did not find expected key while parsing a block mapping

[COLABORATI]

I am getting parse errors, but this is certainly because I do not understand the hoerarchy of the required configuration items. Would you please like to provide a complete, working example fo a configuration file with some common options like e.g.

config.vm.network "private_network", ip: "10.10.10.10"
config.vm.box_check_update = false
config.vm.network "forwarded_port", guest: 80, host: 8080
config.vm.synced_folder "/path/to/data", "/data", type: "nfs", nfs_udp: false
config.vm.provider "virtualbox" do |vb|
    vb.memory = "1024"
    vb.linked_clone = true
  end

Thank you very much!