/** * <code>optional .openxc.RTCConfigurationCommand rtc_configuration_command = 8;</code> */ private com.google.protobuf.SingleFieldBuilderV3< com.openxc.BinaryMessages.RTCConfigurationCommand, com.openxc.BinaryMessages.RTCConfigurationCommand.Builder, com.openxc.BinaryMessages.RTCConfigurationCommandOrBuilder> getRtcConfigurationCommandFieldBuilder() { if (rtcConfigurationCommandBuilder_ == null) { rtcConfigurationCommandBuilder_ = new com.google.protobuf.SingleFieldBuilderV3< com.openxc.BinaryMessages.RTCConfigurationCommand, com.openxc.BinaryMessages.RTCConfigurationCommand.Builder, com.openxc.BinaryMessages.RTCConfigurationCommandOrBuilder>( getRtcConfigurationCommand(), getParentForChildren(), isClean()); rtcConfigurationCommand_ = null; } return rtcConfigurationCommandBuilder_; } public final Builder setUnknownFields(