public Builder setFileName(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      fileName_ = value;
      bitField0_ |= 0x00000001;
      onChanged();
      return this;
    }
<pre>
Output only. e.g: &lt;shard-id&gt;.rdb
</pre>

<code>string file_name = 1 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>

@param value The fileName to set.
@return This builder for chaining.
java-valkey/proto-google-cloud-valkey-v1/src/main/java/com/google/cloud/memorystore/v1/BackupFile.java