@Documented()@TypeQualifier()@Retention(value = RetentionPolicy.RUNTIME) 
public @interface UDFunction

Modifier and Type	Method	Description
`abstract boolean`	`nobuffer()`
`abstract boolean`	`deterministic()`
`abstract boolean`	`hasShortcut()`	If a function has a shortcut, the namespace can be avoid
`abstract String`	`description()`

Methods inherited from class java.lang.annotation.Annotation
annotationType, equals, hashCode, toString
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

hasShortcut
```
 abstract boolean hasShortcut()
```
If a function has a shortcut, the namespace can be avoid

Annotation UDFunction