public Builder peerValidators(final List<PeerValidator> peerValidators) {
      checkNotNull(peerValidators);
      this.peerValidators.addAll(peerValidators);
      return this;
    }
Create a responder that only responds with a fixed portion of the available data.

@param portion The portion of the available data to return, from 0 to 1
ethereum/eth/src/test/java/org/hyperledger/besu/ethereum/eth/manager/RespondingEthPeer.java