def _apply_section_children(self, section, hosts):
        """
        Add the variables for each entry in a 'children' section to the hosts
        belonging to that entry.
        """
        for entry in section['entries']:
            for hostname in self._group_get_hostnames(entry['name']):
                host = hosts[hostname]
                for var_key, var_val in entry['hostvars'].items():
                    host['hostvars'][var_key] = var_val
Add the variables for each entry in a 'children' section to the hosts
        belonging to that entry.