src/main/java/com/passkit/grpc/Flights/PassengerOuterClass.java
public Builder clearDocumentNumber() {
        
        documentNumber_ = getDefaultInstance().getDocumentNumber();
        onChanged();
        return this;
      }
/**
       * <pre>
       * The number or other unique identifying reference of the traveler's document.
       * </pre>
       *
       * <code>string documentNumber = 4;</code>
       * @return This builder for chaining.
       */

The number or other unique identifying reference of the traveler's document.

string documentNumber = 4;
@return This builder for chaining.
The number or other unique identifying reference of the traveler ' s document . string documentNumber = 4 ; @return This builder for chaining .
public Builder clearDocumentNumber() {
        documentNumber_ = getDefaultInstance().getDocumentNumber();
        onChanged();
        return this;
      }
public Builder clearDocumentNumber ( ) { documentNumber_ = getDefaultInstance ( ) . getDocumentNumber ( ) ; onChanged ( ) ; return this ; }
<pre>
 The number or other unique identifying reference of the traveler's document.
<pre > The number or other unique identifying reference of the traveler ' s document .