A modern programming language that makes developers happier.

kotlinlang

E.g. for horizontal layout:
```
         +--------+         +--------+ +--------+ +--------+ +--------+
Category |      |v| Section |      |v| |   Add  | | Remove | | Cancel |
         +--------+         +--------+ +--------+ +--------+ +--------+
```
Vertical layout:
```
         +--------+
Category |      |v|
         +--------+
         +--------+
 Section |      |v|
         +--------+
+--------+
|   Add  |
+--------+
+--------+
| Remove |
+--------+
+--------+
| Cancel |
+--------+
```
And square set:
```
          +--------+
 Category |      |v|
          +--------+
          +--------+
  Section |      |v|
          +--------+
+--------+ +--------+
|   Add  | | Remove |
+--------+ +--------+
     +--------+
     | Cancel |
     +--------+
```