default BlockAwareOperationTracer getOperationTracer() {
    return BlockAwareOperationTracer.NO_TRACING;
  }
Method that returns an OperationTracer that will be used when executing transactions that are
candidates to be added to a block.

@return OperationTracer to be used to trace candidate transactions
plugin-api/src/main/java/org/hyperledger/besu/plugin/services/txselection/PluginTransactionSelector.java