code: public static void setBusinessCardProvider (@Nonnull final IPDBusinessCardProvider aBCProvider)
    {
      ValueEnforcer.notNull (aBCProvider, "BCProvider");
      s_aRWLock.writeLocked ( () -> s_aBCProvider = aBCProvider);
    }
docs: Set the global {@link IPDBusinessCardProvider} that is used for future
  create/update requests.
  
  @param aBCProvider
  Business card provider to be used. May not be <code>null</code>.