default long targetGasUsed(final BlockHeader blockHeader) {
    return blockHeader.getGasLimit() / getSlackCoefficient();
  }
Compute the "gas target" for this block, which results in no baseFee adjustment in a subsequent
block.

@param blockHeader block header to compute gas target of.
@return long target gas value.
ethereum/core/src/main/java/org/hyperledger/besu/ethereum/mainnet/feemarket/BaseFeeMarket.java