public Block getBlock() {
    return block;
  }
Construct a {@link GenesisState} from a JSON object.

@param genesisStateRoot The root of the genesis state.
@param genesisConfig A {@link GenesisConfig} describing the genesis block.
@param protocolSchedule A protocol Schedule associated with
@return A new {@link GenesisState}.
ethereum/core/src/main/java/org/hyperledger/besu/ethereum/chain/GenesisState.java