// Copy sources to sinks in both directions.
        val toSource = toSocket.source().buffer()
        val toSink = toSocket.sink().buffer()
        openSockets.add(toSocket)
        transfer(fromAddress, toAddress, fromSource, toSink)
        transfer(fromAddress, toAddress, toSource, fromSink)
      }

      else -> throw ProtocolException("unexpected command: $command")
    }
  }

            org.apache.maven.model.building.ModelSource modelSource, ProjectBuildingRequest request)
            throws ProjectBuildingException {
        return build(toSource(modelSource), request);
    }

    @Deprecated
    static ModelSource toSource(org.apache.maven.model.building.ModelSource modelSource) {
        if (modelSource instanceof FileModelSource fms) {
            return Sources.buildSource(fms.getPath());