gimme this static please ;)

golo and static

I need to access this static int:
http://libgdx.badlogicgames.com/nightlies/docs/api/com/badlogic/gdx/Input.Keys.html#LEFT

I tried:

import com.badlogic.gdx.Input
and/or
import com.badlogic.gdx.Input.Keys

then
use it either in a if statement or simply to test:

let leftKey =  Input.Keys.LEFT()
==> Exception in thread "LWJGL Application" com.badlogic.gdx.utils.GdxRuntimeException: java.lang.NoSuchMethodError: Input.Keys.LEFT()Ljava/lang/Object;
	at com.badlogic.gdx.backends.lwjgl.LwjglApplication$1.run(LwjglApplication.java:120)
Caused by: java.lang.NoSuchMethodError: Input.Keys.LEFT()Ljava/lang/Object;
	at fr.insalyon.citi.golo.runtime.FunctionCallSupport.fallback(FunctionCallSupport.java:146)

or

let leftKey =  com.badlogic.gdx.Input.Keys.LEFT()
==> Exception in thread "LWJGL Application" com.badlogic.gdx.utils.GdxRuntimeException: java.lang.NoSuchMethodError: com.badlogic.gdx.Input.Keys.LEFT()Ljava/lang/Object;
	at com.badlogic.gdx.backends.lwjgl.LwjglApplication$1.run(LwjglApplication.java:120)
Caused by: java.lang.NoSuchMethodError: com.badlogic.gdx.Input.Keys.LEFT()Ljava/lang/Object;
	at fr.insalyon.citi.golo.runtime.FunctionCallSupport.fallback(FunctionCallSupport.java:146)