Adding fields:

my-plugin-build-with-risbl-admin.php

<?php

// Risbl_Admin_Field object
$field = Risbl_Admin_Field();

// Add input field
echo $field->input([
    'id' => 'subscriber',
    'label' => __('Subscriber', 'risbl-default-page-after-user-login'),
    'description' => sprintf(__('URL to open after login for %s user role.', 'risbl-default-page-after-user-login'), 'Subscriber'),
    'type' => 'text',
    'placeholder' => __('Enter URL', 'risbl-default-page-after-user-login'),
    'default_value' => '',
    'layout' => 'wp-admin-form-table',
    'class' => 'regular-text',
    'part_of' => isset($_GET['param']) && $_GET['param'] === 'value',
]);