code: public void setBuiltInCreativeRotationType(com.google.api.ads.admanager.axis.v201805.CreativeRotationType builtInCreativeRotationType) {
          this.builtInCreativeRotationType = builtInCreativeRotationType;
      }
docs: Sets the builtInCreativeRotationType value for this ProposalLineItemConstraints.
  
  @param builtInCreativeRotationType   * The built-in creative rotation type for the created {@link
  ProposalLineItem}.
  
  <p>This attribute is read-only.