code: public static com.liferay.commerce.tax.engine.fixed.model.CommerceTaxFixedRate updateCommerceTaxFixedRate(
  		com.liferay.commerce.tax.engine.fixed.model.CommerceTaxFixedRate commerceTaxFixedRate) {
  		return getService().updateCommerceTaxFixedRate(commerceTaxFixedRate);
  	}
docs: Updates the commerce tax fixed rate in the database or adds it if it does not yet exist. Also notifies the appropriate model listeners.
  
  @param commerceTaxFixedRate the commerce tax fixed rate
  @return the commerce tax fixed rate that was updated