wc-composable-product/tests/stubs/class-wc-settings-page.php

<?php
/**
 * Minimal WC_Settings_Page stub for unit testing.
 */
class WC_Settings_Page {
    protected $id = '';
    protected $label = '';

    public function __construct() {
    }

    public function get_id() {
        return $this->id;
    }

    public function get_label() {
        return $this->label;
    }

    public function get_settings() {
        return [];
    }

    public function output() {
    }

    public function save() {
    }
}