public Builder setHostnameBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      hostname_ = value;
      bitField0_ |= 0x00000008;
      onChanged();
      return this;
    }
<pre>
Required. Fully-qualified domain name (FQDN) or IP Address of the logging
server.
</pre>

<code>string hostname = 5 [(.google.api.field_behavior) = REQUIRED];</code>

@param value The bytes for hostname to set.
@return This builder for chaining.
java-vmwareengine/proto-google-cloud-vmwareengine-v1/src/main/java/com/google/cloud/vmwareengine/v1/LoggingServer.java