@Override
  public Collection<Address> getValidatorsAfterBlock(final BlockHeader parentHeader) {
    final long nextBlock = parentHeader.getNumber() + 1;
    return resolveValidatorProvider(nextBlock).getValidatorsAfterBlock(parentHeader);
  }
Instantiates a new Forking validator provider.

@param blockchain the blockchain
@param forksSchedule the forks schedule
@param blockValidatorProvider the block validator provider
@param transactionValidatorProvider the transaction validator provider
consensus/qbft/src/main/java/org/hyperledger/besu/consensus/qbft/validator/ForkingValidatorProvider.java