Support for interfaces in the Graal API: Make interfaces implemented by a ResolvedJavaType available; change semantics of ResolvedJavaType.getSuperclass to return null for interfaces (to conform with java.lang.Class); change semantics of ResolvedJavaType.isInstanceClass to return false for interfaces.

public class T
{
  public static boolean foo(boolean bar)
  {
    return bar;
  }

  public static void printIt()
  {
    System.out.println("Hello");
  }
}