What to use instead of import keyword

I'm using the following sample manifest from camptocamp/puppet-nagios:

node 'central_monitoring_server' {
  import "nagios"

  $nagiosadmin_password = "XXXX"

  ...

  include apache::base

  include nagios::base
  include nagios::nsca::daemon
  include nagios::webinterface
} 

However I've the warning:

Warning: The use of 'import' is deprecated at nagios.pp. See http://links.puppetlabs.com/puppet-import-deprecation

I've followed the link which says:

New users should avoid the import keyword, and existing users should
stop using it. Instead, do the following:

• To keep your node definitions in separate files, specify a directory as your main manifest.
• To load classes and defined types, use modules.

Together, these two features replace import completely.

However this is not clear what actually I should do.

Can I just use the include keyword instead of import as:

include nagios

Is that all? Is that should work in the same way?

I'm using puppet v3.7.4.