public com.google.api.ads.adwords.axis.v201809.cm.Label[] getLabels() {
        return labels;
    }
public com . google . api . ads . adwords . axis . v201809 . cm . Label [ ] getLabels ( ) { return labels ; }
Gets the labels value for this AdGroupCriterion.

@return labels   * Labels that are attached to the AdGroupCriterion. To associate
an existing {@link Label} to an
existing {@link AdGroupCriterion}, use {@link AdGroupCriterionService#mutateLabel}
with ADD
operator. To remove an associated {@link Label} from
the {@link AdGroupCriterion}, use
{@link AdGroupCriterionService#mutateLabel} with REMOVE
operator. To filter on {@link Label}s,
use one of {@link Predicate.Operator#CONTAINS_ALL},
{@link Predicate.Operator#CONTAINS_ANY},
{@link Predicate.Operator#CONTAINS_NONE} operators
with a list of {@link Label} ids.
<span class="constraint CampaignType">This field may
not be set for campaign channel subtype UNIVERSAL_APP_CAMPAIGN.</span>
<span class="constraint ReadOnly">This field is read only and will
be ignored when sent to the API for the following {@link Operator}s:
REMOVE and SET.</span>