code: public com.google.api.ads.admanager.axis.v201902.Money getBudget() {
          return budget;
      }
docs: Gets the budget value for this BuyerRfp.
  
  @return budget   * Total amount of {@link Money} available to spend on this deal.
  In the case of Preferred
  Deal, the budget is equal to the maximum amount of
  money a buyer is willing to spend on a given
  {@link Proposal}, even though the budget might not
  be spent entirely, as impressions are not
  guaranteed.
  <span class="constraint ReadOnly">This attribute is
  read-only when:<ul><li>using programmatic guaranteed, not using sales
  management.</li><li>using preferred deals, not using sales management.</li></ul></span>