Add hasConfigSchema() method.

Awesome, thanks @vijaycs85!

Also tagging this as blocker. We currently have this as a procedural method in config_translation but A) this is in no way specific to config_translation and B) procedural function --

So let's get this out of the way.

You know this needs tests. A simple one checking a config schema that does not exist and one that does would be great. I think we may have in fact some test for a similar thing that can be extended.

Yeah, I guess tests can't hurt. And it was especially easy with your help! Thanks again.

+++ b/core/lib/Drupal/Core/Config/TypedConfigManager.php
@@ -298,7 +298,7 @@ public function hasConfigSchema($name) {
-    return is_array($definition) && $definition['class'] != '\Drupal\Core\Config\Schema\Property';
+    return is_array($definition) && ($definition['class'] != '\Drupal\Core\Config\Schema\Property');

Oh yeah, that is not really necessary, but I hate to stare at something for 5 seconds until I grok it, and I think it's clearer this way.

That's embarassing. As soon as there's no autocompletion, I get 3 fatals for 3 LoC.

Damn, I really need some sleep. The interdiff is correct, but this should have been the patch. #8 is identical to #5.

Lets create a TypedConfigManagerInterface as we're adding a public method to an object.

Yay! Resolves the above concerns :)

Committed and pushed to 8.x. Thanks!