public static int calculateRequiredValidatorQuorum(final int validatorCount) {
    return Util.fastDivCeiling(2 * validatorCount, 3);
  }
Calculate required validator quorum int.

@param validatorCount the validator count
@return the int
consensus/common/src/main/java/org/hyperledger/besu/consensus/common/bft/BftHelpers.java