code: public com.google.api.ads.admanager.axis.v201805.Size[] getSizes() {
          return sizes;
      }
docs: Gets the sizes value for this LineItemCreativeAssociation.
  
  @return sizes   * Overrides the value set for {@link Creative#size}, which allows
  the
  creative to be served to ad units that would otherwise
  not be compatible
  for its actual size. This value is optional.