copyWith method
      
Update
copyWith({ 
    
    
- ProposedProtocolParameterUpdates? proposedProtocolParameterUpdates,
- int? epoch,
Implementation
Update copyWith(
    {ProposedProtocolParameterUpdates? proposedProtocolParameterUpdates,
    int? epoch}) {
  return Update(
      proposedProtocolParameterUpdates: proposedProtocolParameterUpdates ??
          this.proposedProtocolParameterUpdates,
      epoch: epoch ?? this.epoch);
}