Interpolates an abstract value and supplies it to a method called over time.
MethodTweener is similar to a combination of CallbackTweener and PropertyTweener. It calls a method providing an interpolated value as a parameter. See SceneTreeTween.tween_method for more usage information.
Note: SceneTreeTween.tween_method is the only correct way to create
MethodTweener created manually will not function correctly.
Sets the time in seconds after which the
MethodTweener will start interpolating. By default there's no delay.