checkbox title/description conundrum

[chx]

1. AFAIK Drupal 7 doesn't have such a thing
2. But D8 does and migration tries to create #type => checkbox

In D7 you have a div wrapping a single checkbox where the element title goes on the div and the single checkbox option becomes the title of the checkbox

In D8 as it stands we end up a single checkbox , the element title becomes #title and the single checkbox option becomes #description. This is wildly different from D7. Perhaps a #prefix / #suffix replicating the wrapping div (not sure whether webform supports) and keeping the checkbox option as title would work better?

[opi]

FYI here is a custom patch I use to fix migration of single checkboxes (issue with #title / #description)

diff --git a/src/Plugin/migrate/source/d7/D7Webform.php b/src/Plugin/migrate/source/d7/D7Webform.php
index 7633c98..d563a1e 100644
--- a/src/Plugin/migrate/source/d7/D7Webform.php
+++ b/src/Plugin/migrate/source/d7/D7Webform.php
@@ -353,7 +353,16 @@ class D7Webform extends DrupalSqlBase implements ImportAwareInterface, RollbackA
           elseif (!empty($extra['multiple']) && count($valid_options) == 1) {
             $select_type = 'checkbox';
             list($key, $desc) = explode('|', $extra['items']);
-            $markup .= "$indent  '#description': \"" . $this->cleanString($desc) . "\"\n";
+            // Use 'description' as title, and use 'after' display for unique checkbox
+            // $element['name'] = $this->cleanString($desc);
+            $element['name'] = $desc;
+            $extra['title_display'] = 'before';
+
+            // Force #multiple key
+            $extra['multiple'] = false;
+
+            // Do not populate '#description' key as is generate "Duplicate key" errors.
+            // $markup .= "$indent  '#description':  " . $this->cleanString($desc) . "\"\n";
           }
           else {
             $select_type = 'radios';