Sample Episerver Content Delivery API configuration with new options introduced in Episerver update 296 (https://world.episerver.com/releases/episerver---update-296/)

ContentDeliveryApiInitialization.cs

using System;
using EPiServer.Framework;
using EPiServer.Framework.Initialization;
using EPiServer.ServiceLocation;

namespace ContentDelivery.NewFeatures.Web.Business.Initialization
{
    [InitializableModule]
    [ModuleDependency(typeof(EPiServer.ContentApi.Cms.ContentApiCmsInitialization))]
    public class ContentDeliveryApiInitialization : IConfigurableModule
    {
        public void ConfigureContainer(ServiceConfigurationContext context)
        {
            if (context == null)
            {
                throw new ArgumentNullException(nameof(context));
            }

            context.Services.Configure<EPiServer.ContentApi.Core.Configuration.ContentApiConfiguration>(config =>
            {
                // contentapiread is the default role for content delivery API (and it is by default set to the RequiredRole
                // and it is also by default mapped to: WebAdmins, WebEditors and Administrators
                // setting MinimumRoles to string.Empty allows anonymous calls

                config.Default()
                .SetMinimumRoles(string.Empty)
                .SetMultiSiteFilteringEnabled(false)
                .SetRequiredRole("contentapiread")
                .SetSiteDefinitionApiEnabled(true)
                .SetIncludeNullValues(false) // new option
                .SetIncludeMasterLanguage(false) // new option
                .SetFlattenPropertyModel(true) // new option
                .SetValidateTemplateForContentUrl(false); // new option
            });
        }

        public void Initialize(InitializationEngine context)
        {
            //Add initialization logic, this method is called once after CMS has been initialized
        }

        public void Uninitialize(InitializationEngine context)
        {
            //Add uninitialization logic
        }
    }
}