private TransactionSelectionResult evaluatePreProcessing(
      final TransactionEvaluationContext evaluationContext) {

    for (var selector : transactionSelectors) {
      TransactionSelectionResult result =
          selector.evaluateTransactionPreProcessing(evaluationContext);
      if (!result.equals(SELECTED)) {
        return result;
      }
    }
    return pluginTransactionSelector.evaluateTransactionPreProcessing(evaluationContext);
  }
This method evaluates a transaction by pre-processing it through a series of selectors. It
first processes the transaction through internal selectors, and if the transaction is selected,
it then processes it through external selectors. If the transaction is selected by all
selectors, it returns SELECTED.

@param evaluationContext The current selection session data.
@return The result of the transaction selection process.
ethereum/blockcreation/src/main/java/org/hyperledger/besu/ethereum/blockcreation/txselection/BlockTransactionSelector.java