Approval.

cs/units_count_parts_set.php

@@ -0,0 +1,10 @@
+<?PHP
+declare(strict_types = 1);
+$units_count_parts_set = array (
+  'parts' => 'Parts',
+  'pages' => 'Pages',
+  'sheets' => 'Sheets',
+  'double_pages' => 'Double pages',
+  'standalone_sheets' => 'Standalone sheets',
+  'written_pages' => 'Written pages',
+);