src/main/java/com/passkit/grpc/SingleUseCoupons/CouponOuterClass.java
public Builder clearTransactionReference() {
        
        transactionReference_ = getDefaultInstance().getTransactionReference();
        onChanged();
        return this;
      }
/**
       * <pre>
       * Optional transaction reference, can be used to consolidate baskets at a later stage via a manual process.
       * </pre>
       *
       * <code>string transactionReference = 8;</code>
       * @return This builder for chaining.
       */

Optional transaction reference, can be used to consolidate baskets at a later stage via a manual process.

string transactionReference = 8;
@return This builder for chaining.
Optional transaction reference can be used to consolidate baskets at a later stage via a manual process . string transactionReference = 8 ; @return This builder for chaining .
public Builder clearTransactionReference() {
        transactionReference_ = getDefaultInstance().getTransactionReference();
        onChanged();
        return this;
      }
public Builder clearTransactionReference ( ) { transactionReference_ = getDefaultInstance ( ) . getTransactionReference ( ) ; onChanged ( ) ; return this ; }
<pre>
 Optional transaction reference, can be used to consolidate baskets at a later stage via a manual process.
<pre > Optional transaction reference can be used to consolidate baskets at a later stage via a manual process .