code: public com.google.api.ads.admanager.axis.v201811.CreativeRotationType getBuiltInCreativeRotationType() {
          return builtInCreativeRotationType;
      }
docs: Gets the builtInCreativeRotationType value for this ProposalLineItemConstraints.
  
  @return builtInCreativeRotationType   * The built-in creative rotation type for the created {@link
  ProposalLineItem}.
  
  <p>This attribute is read-only.