A modern programming language that makes developers happier.

kotlinlang

```/Users/shamsasari/git/corda/finance/src/main/java/net/corda/contracts/JavaCommercialPaper.java:57: error: Test is not abstract and does not override abstract method foo() in TestA
    public static class Test extends TestB {
                  ^
/Users/shamsasari/git/corda/finance/src/main/java/net/corda/contracts/JavaCommercialPaper.java:59: error: foo() in Test cannot implement foo() in TestA
        public void foo() {
                    ^
  return type void is not compatible with Unit
  where T is a type-variable:
    T extends Object declared in interface TestA
```