code: public com.google.api.ads.admanager.axis.v201811.CompanionDeliveryOption getCompanionDeliveryOption() {
          return companionDeliveryOption;
      }
docs: Gets the companionDeliveryOption value for this LineItemSummary.
  
  @return companionDeliveryOption   * The delivery option for companions. Setting this field is only
  meaningful
  if the following conditions are met:
  <ol>
  <li>
  The <b>Guaranteed roadblocks</b> feature is enabled
  on your network.
  </li>
  <li>
  One of the following is true (both cannot be true,
  these are mutually
  exclusive).
  <ul>
  <li>
  The {@link #environmentType} is {@link EnvironmentType#VIDEO_PLAYER}.
  </li>
  <li>
  The {@link #roadblockingType} is {@link RoadblockingType#CREATIVE_SET}.
  </li>
  </ul>
  </li>
  </ol>
  <p>
  This field is optional and defaults to
  {@link CompanionDeliveryOption#OPTIONAL} if the above
  conditions are met.
  In all other cases it defaults to {@link CompanionDeliveryOption#UNKNOWN}
  and is not meaningful.