more examples

Author: martinbonnin

Writerside/topics/schema.md

@@ -386,13 +386,15 @@ Nullable fields and input fields are also nullable in GraphQL:
 <code-block lang="kotlin">
 class User {
     fun email(): String?
+    fun id(): String
 }
 </code-block>
 </td>
 <td>
 <code-block lang="graphql">
 type User {
     email: String
+    id: String!
 }
 </code-block>
 </td>