src/main/java/com/passkit/grpc/Flights/Barcode.java
public Builder clearBoardingPassIssuanceSource() {
        
        boardingPassIssuanceSource_ = 0;
        onChanged();
        return this;
      }
/**
       * <pre>
       * Source of boarding pass issuance as detailed in IATA PSC Resolution 792 Attachment 'C'.
       * </pre>
       *
       * <code>.flights.Source boardingPassIssuanceSource = 3;</code>
       * @return This builder for chaining.
       */

Source of boarding pass issuance as detailed in IATA PSC Resolution 792 Attachment 'C'.

.flights.Source boardingPassIssuanceSource = 3;
@return This builder for chaining.
Source of boarding pass issuance as detailed in IATA PSC Resolution 792 Attachment ' C ' . . flights . Source boardingPassIssuanceSource = 3 ; @return This builder for chaining .
public Builder clearBoardingPassIssuanceSource() {
        boardingPassIssuanceSource_ = 0;
        onChanged();
        return this;
      }
public Builder clearBoardingPassIssuanceSource ( ) { boardingPassIssuanceSource_ = 0 ; onChanged ( ) ; return this ; }
<pre>
 Source of boarding pass issuance as detailed in IATA PSC Resolution 792 Attachment 'C'.
<pre > Source of boarding pass issuance as detailed in IATA PSC Resolution 792 Attachment ' C ' .