A modern programming language that makes developers happier.

kotlinlang

<https://gist.github.com/Hamzantal/f603f6065cd0addd96827d04b6005730>
anyone able to see what’s happening here? Here is the stack trace:
```
Exception in thread "main" com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Invalid type definition for type `id.or.jisedu.repo.Book`: Argument #0 of constructor [constructor for id.or.jisedu.repo.Book, annotations: [null]] has no property name annotation; must have name when multiple-parameter constructor annotated as Creator
 at [Source: (String)"…"
```