WordPress: how to validate a nonce generated by a custom WP_List_Table

validate-nonce-from-custom-wp-list-table.php

<?php

class Custom_List_Table extends WP_List_Table() {
	// custom list table code here
}

$list_table = new Custom_List_Table();
$list_table->prepare_items();

// verify the nonce field generated near the bulk actions menu
wp_verify_nonce( $_REQUEST['_wpnonce'], 'bulk-' . $list_table->_args['plural'] );

//suggestion
if(isset($_REQUEST['_wpnonce'])){
wp_verify_nonce( $_REQUEST['_wpnonce'], 'bulk-' . $cbxaccountingllog->_args['plural'] );
}