private void When(ProjectBindingAdded @event)
 {
     ProjectBindings.Add(@event.ProjectBinding);
 }
        /// <inheritdoc />
        public async Task Handle(ProjectBindingAdded @event, CancellationToken cancellationToken)
        {
            var readModel = mapper.Map <ProjectBindingReadModel>(@event.ProjectBinding);

            await Update(@event, distribution => distribution.ProjectBindings.Add(readModel), cancellationToken);
        }