Alias.Transitionval shorthand :
?behavior:Css_types.TransitionBehavior.Value.t ->
?duration:Css_types.Time.t ->
?delay:Css_types.Time.t ->
?timingFunction:Css_types.EasingFunction.t ->
?property:Css_types.TransitionProperty.t ->
unit ->
[> `value of Css_types.Transition.Value.value ]