public int getSyncMinimumPeerCount() {
    return syncMinimumPeerCount;
  }
The rate at which blocks should be fully validated during fast sync. At a rate of 1f, all
blocks are fully validated. At rates less than 1f, a subset of blocks will undergo light-weight
validation.

@return rate at which blocks should be fully validated during fast sync.
ethereum/eth/src/main/java/org/hyperledger/besu/ethereum/eth/sync/SynchronizerConfiguration.java