( FKeyHandle KeyHandle ) const {  UMovieSceneParticleSection* ParticleSection = Cast<UMovieSceneParticleSection>( &Section );  if ( ParticleSection != nullptr )  {   FIntegralKey ParticleKey = ParticleSection->GetParticleCurve().GetKey(KeyHandle);   if ( (EParticleKey::Type)ParticleKey.Value == EParticleKey::Activate )   {    return 