public Builder clearEngineVersion() {
      engineVersion_ = getDefaultInstance().getEngineVersion();
      bitField0_ = (bitField0_ & ~0x00000040);
      onChanged();
      return this;
    }
<pre>
Output only. valkey-7.5/valkey-8.0, etc.
</pre>

<code>string engine_version = 7 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>

@return This builder for chaining.
java-valkey/proto-google-cloud-valkey-v1/src/main/java/com/google/cloud/memorystore/v1/Backup.java