public RequestProcessorCoordinator build() {
      final ImmutableSortedMap<RequestType, RequestProcessor> processors =
          requestProcessorBuilder.build();
      if (processors.isEmpty()) {
        throw new IllegalStateException("No processors added to RequestProcessorCoordinator");
      }
      return new RequestProcessorCoordinator(processors);
    }
Constructs a RequestsProcessor with a given map of processors.

@param processors A map associating RequestType with their corresponding RequestProcessor.
ethereum/core/src/main/java/org/hyperledger/besu/ethereum/mainnet/requests/RequestProcessorCoordinator.java