code: public void setNetCost(com.google.api.ads.admanager.axis.v201902.Money netCost) {
          this.netCost = netCost;
      }
docs: Sets the netCost value for this ProposalLineItem.
  
  @param netCost   * The cost of the {@code ProposalLineItem} in proposal currency.
  It supports precision of 2
  decimal places in terms of the fundamental currency
  unit, so the
  {@link Money#getAmountInMicros} must be multiples
  of 10000. It doesn't include agency
  commission.
  
  <p>For example, if {@link Proposal#currencyCode} is
  'USD', then $123.45 could be
  represented as 123450000, but further precision is
  not supported.
  
  <p>When using sales management, at least one of the
  four fields
  {@link ProposalLineItem#netRate}, {@link ProposalLineItem#grossRate},
  {@link ProposalLineItem#netCost} and {@link ProposalLineItem#grossCost}
  is required.
  
  <p>When not using sales management, at least one of
  the two fields
  {@link ProposalLineItem#netRate} and {@link ProposalLineItem#netCost}
  is required.