default long getWarmStorageReadCost() {
    return 0L;
  }
Returns the cost of a SLOAD to a storage slot that has previously been loaded in the TX
context.

@return the cost of a SLOAD to a storage slot that has previously been loaded in the TX
    context.
evm/src/main/java/org/hyperledger/besu/evm/gascalculator/GasCalculator.java