@java.lang.Override
      public com.google.protobuf.ByteString getWorkSpecSignature() {
        return workSpecSignature_;
      }
<code>optional bytes work_spec_signature = 2;</code>
@return The workSpecSignature.
llap-common/src/gen/protobuf/gen-java/org/apache/hadoop/hive/llap/daemon/rpc/LlapDaemonProtocolProtos.java