code: public DfuServiceInitiator setCustomUuidsForSecureDfu(@Nullable final UUID dfuServiceUuid,
  														  @Nullable final UUID dfuControlPointUuid,
  														  @Nullable final UUID dfuPacketUuid) {
  		final ParcelUuid[] uuids = new ParcelUuid[3];
  		uuids[0] = dfuServiceUuid      != null ? new ParcelUuid(dfuServiceUuid)      : null;
  		uuids[1] = dfuControlPointUuid != null ? new ParcelUuid(dfuControlPointUuid) : null;
  		uuids[2] = dfuPacketUuid       != null ? new ParcelUuid(dfuPacketUuid)       : null;
  		secureDfuUuids = uuids;
  		return this;
  	}
docs: Sets custom UUIDs for Secure DFU. Use this method if your DFU implementation uses different
  UUID for at least one of the given UUIDs. Parameter set to <code>null</code> will reset
  the UUID to the default value.
  
  @param dfuServiceUuid      custom Secure DFU service UUID or null, if default is to be used
  @param dfuControlPointUuid custom Secure DFU Control Point characteristic UUID or null,
  if default is to be used
  @param dfuPacketUuid       custom Secure DFU Packet characteristic UUID or null, if default
  is to be used
  @return the builder