code: public void setNegotiationStatus(com.google.api.ads.admanager.axis.v201902.NegotiationStatus negotiationStatus) {
          this.negotiationStatus = negotiationStatus;
      }
docs: Sets the negotiationStatus value for this ProposalMarketplaceInfo.
  
  @param negotiationStatus   * The negotiation status of the {@link Proposal}.
  This attribute is read-only.