Hey guys, i am trying to make a toggle that hides my options field when it is false and shows when it is true but it doesnt work...

          contentimgtypes:
            sets:
              contentblok:
                display: Content
                instructions: Dit is een contentbox 
                fields:
                    fade_in:
                      type: toggle
                      display: Fade in
                    fade_in_style:
                      options:
                        fadeInUp: fadeInUp
                        fadeInLeft: fadeInLeft
                      type: select
                      display: Fade In style
                      show_when:
                        fade_in: true
            type: replicator
            display: ContentTypes

please help me out