src/main/java/com/passkit/grpc/SingleUseCoupons/CouponOuterClass.java
public Builder clearTransactionAmount() {
        
        transactionAmount_ = 0D;
        onChanged();
        return this;
      }
/**
       * <pre>
       * Optional total transaction amount.
       * </pre>
       *
       * <code>double transactionAmount = 9;</code>
       * @return This builder for chaining.
       */

Optional total transaction amount.

double transactionAmount = 9;
@return This builder for chaining.
Optional total transaction amount . double transactionAmount = 9 ; @return This builder for chaining .
public Builder clearTransactionAmount() {
        transactionAmount_ = 0D;
        onChanged();
        return this;
      }
public Builder clearTransactionAmount ( ) { transactionAmount_ = 0D ; onChanged ( ) ; return this ; }
<pre>
 Optional total transaction amount.
<pre > Optional total transaction amount .