code: public ServiceProviderBuilder serviceProvider(List<ServiceProviderConfigurer> serviceProviderConfigurers) {
          serviceProviderConfigurers.forEach(unchecked(spc -> spc.configure(serviceProvider())));
          return serviceProviderBuilder;
      }
docs: Returns The {@link ServiceProviderBuilder} for customization of the SAML Service Provider
  
  @param serviceProviderConfigurers A list {@link ServiceProviderConfigurer} to apply to the {@link
  ServiceProviderBuilder}
  before it is returned.
  @return The {@link ServiceProviderBuilder} for customization of the SAML Service Provider