code: public com.google.api.ads.admanager.axis.v201902.FrequencyCap[] getFrequencyCaps() {
          return frequencyCaps;
      }
docs: Gets the frequencyCaps value for this ProposalLineItem.
  
  @return frequencyCaps   * The set of frequency capping units for this {@code ProposalLineItem}.
  This
  attribute is optional during creation and defaults
  to the
  {@link Product#frequencyCaps product's frequency caps}
  if
  {@link Product#allowFrequencyCapsCustomization} is
  {@code false}.