cx-newsletter/converters/5-group_converter.php

<?php

namespace cx_newsletter;

class group_converter
extends database_converter 
implements database_converter_interface {
    public function get_array() : array {
        $this->check_target();

        $result = [];
        $result['name'] = $this->target->name;

        if ($this->target->has_id()) {
            $result['id'] = $this->target->get_id();
        }

        return $result;
    }

    public function load_array(array $target) : self {
        $this->check_all_exists($target, ['name']);

        $this->target = new group($this->id_or_null($target));
        $this->target->name = $target['name'];

        return $this;
    }
}