code: public void setPrimarySalesperson(com.google.api.ads.admanager.axis.v201808.SalespersonSplit primarySalesperson) {
          this.primarySalesperson = primarySalesperson;
      }
docs: Sets the primarySalesperson value for this Proposal.
  
  @param primarySalesperson   * The primary salesperson who brokered the transaction with the
  {@link #advertiser}.
  This attribute is required when the proposal turns
  into an order.
  This attribute can be configured as editable after
  the proposal has been submitted.
  Please check with your network administrator for editable
  fields configuration.