public com.google.protobuf.ByteString getTargetEngineVersionBytes() {
          java.lang.Object ref = targetEngineVersion_;
          if (ref instanceof String) {
            com.google.protobuf.ByteString b =
                com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
            targetEngineVersion_ = b;
            return b;
          } else {
            return (com.google.protobuf.ByteString) ref;
          }
        }
<pre>
Output only. Target engine version for the instance.
</pre>

<code>
optional string target_engine_version = 3 [(.google.api.field_behavior) = OUTPUT_ONLY];
</code>

@return The bytes for targetEngineVersion.
java-valkey/proto-google-cloud-valkey-v1/src/main/java/com/google/cloud/memorystore/v1/Instance.java