/usr/share/doc/ is in netplan.io 0.40.1~18.04.4.
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/usr/share/doc/netplan.io/
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/usr/share/doc/netplan.io/copyright
/usr/share/doc/netplan.io/examples/
/usr/share/doc/netplan.io/examples/bonding.yaml
/usr/share/doc/netplan.io/examples/bonding_router.yaml
/usr/share/doc/netplan.io/examples/bridge.yaml
/usr/share/doc/netplan.io/examples/bridge_vlan.yaml
/usr/share/doc/netplan.io/examples/dhcp.yaml
/usr/share/doc/netplan.io/examples/direct_connect_gateway.yaml
/usr/share/doc/netplan.io/examples/loopback_interface.yaml
/usr/share/doc/netplan.io/examples/network_manager.yaml
/usr/share/doc/netplan.io/examples/source_routing.yaml
/usr/share/doc/netplan.io/examples/static.yaml
/usr/share/doc/netplan.io/examples/static_multiaddress.yaml
/usr/share/doc/netplan.io/examples/static_singlenic_multiip_multigateway.yaml
/usr/share/doc/netplan.io/examples/vlan.yaml
/usr/share/doc/netplan.io/examples/windows_dhcp_server.yaml
/usr/share/doc/netplan.io/examples/wireless.yaml
/usr/share/doc/netplan.io/netplan.html