fader_form_state library Null safety

Classes

AnimationMillisecondsFaderFormError
AppIdFaderFormError
BackgroundFaderFormError
ConditionsFaderFormError
DescriptionFaderFormError
DocumentIDFaderFormError
FaderFormError
FaderFormInitialized
FaderFormLoaded
FaderFormState
FaderFormUninitialized
ImageSecondsFaderFormError
ItemsFaderFormError
SubmittableFaderForm