+ /***
+ * This method allows you to set the speed of the motor(s). The range of speed
+ * is from [-1, 1]. A negative speed changes the direction of the motors.
+ *
+ * @param speed
+ * The speed of the motors that control the rollers. The range of
+ * these motors go from [-1,1]. A negative speed changes the
+ * direction of the motors.
+ */
+
+ public void setRollerSpeed(double speed) {
+
+ }
+
+ /***
+ *
+ * @return
+ */
+
+ public double getRollerSpeed() {
+ return 0;
+ }
+
+ /***
+ *
+ * @return
+ */
+
+ public boolean isBallInside() {
+ return true;
+ }
+
+ /***
+ *
+ * @return
+ */
+
+ public boolean areRollersRolling() {
+ return true;
+ }
+