To obtain proto files from other repositories use:
wget https://raw.githubusercontent.com/AISphere/ffdl-commons/master/service/lcm.proto
wget https://raw.githubusercontent.com/AISphere/ffdl-trainer/master/trainer/grpc_trainer_v2/trainer.proto
wget https://raw.githubusercontent.com/AISphere/ffdl-model-metrics/master/service/grpc_training_data_v1/training_data.proto