Issue #3466324 by mogtofu33, grimreaper: [1.0.0-alpha3] Config Schema: flatten structure

Closes #3466324

config/schema/ui_icons.schema.yml

+ui_icons.icon_pack_options.*:
+  type: ui_icons.icon_pack_options_default
+  label: 'Default settings'
+  constraints:
+    FullyValidatable: ~
+
+ui_icons.icon_pack_options_default:
+  type: mapping
+  label: 'Default settings'
+  constraints:
+    FullyValidatable: ~
+  mapping:
+    width:
+      type: integer
+      label: 'Width'
+      constraints:
+        Range:
+          min: 0
+    height:
+      type: integer
+      label: 'Height'
+      constraints:
+        Range:
+          min: 0
+    title:
+      type: label
+      label: 'Title'
+    alt:
+      type: label
+      label: 'Alternative text'

[Wim Leers]

If you're going to follow my suggestion/recommendation at https://www.drupal.org/project/ui_icons/issues/3466324#comment-15735424, then every top-level entry in a *.schema.yml file will need additions like this:

-ui_icons.icon_pack_options.*:
-  type: ui_icons.icon_pack_options_default
-  label: 'Default settings'
-
-ui_icons.icon_pack_options_default:
-  type: mapping
-  label: 'Default settings'
+ui_icons.icon_pack_options.*:
+  type: ui_icons.icon_pack_options_default
+  label: 'Default settings'
+  constraints:
+    FullyValidatable: ~
+
+ui_icons.icon_pack_options_default:
+  type: mapping
+  label: 'Default settings'
+  constraints:
+    FullyValidatable: ~

… and then you'd get a very high degree of confidence in your config schema and all config using it!

[Florent Torregrosa]

every, right? because the percentage of validatibility had not increased yet.