code: public final void initialize(FaxClientSpi faxClientSpi)
      {
          if(this.initialized)
          {
              throw new FaxException("Fax client SPI interceptor already initialized.");
          }
          
          //set flag
          this.initialized=true;
          
          //get configuration
          this.faxClientSpiInstance=faxClientSpi;
          
          //initialize
          this.initializeImpl();
      }
docs: This function initializes the fax client SPI interceptor.<br>
  This method is called by the FaxClientSpiFactory.
  
  @param   faxClientSpi
  The fax client SPI