in src/Extensions/DependencyInjection/FunctionsConfigurationBuilder.cs [12:16]
public FunctionsConfigurationBuilder(IConfigurationBuilder configurationBuilder, WebJobsBuilderContext webJobsBuilderContext)
{
ConfigurationBuilder = configurationBuilder ?? throw new ArgumentNullException(nameof(configurationBuilder));
Context = new DefaultFunctionsHostBuilderContext(webJobsBuilderContext);
}