Sitecore Aggregation pipeline processor code

PageEventProcessor.cs

using Microsoft.Extensions.DependencyInjection;
using Sitecore.Analytics.Aggregation.Pipeline;
using Sitecore.Configuration;
using Sitecore.Data;
using Sitecore.DependencyInjection;
using Sitecore.Diagnostics;
using Sitecore.XConnect.Collection.Model;
using System;
using System.Collections.Generic;
using System.Linq;

namespace Core.Foundation.Analytics.Collection.Pipelines.Aggregation
{
  [Service(typeof(PageEventProcessor))]
  public class PageEventProcessor : InteractionAggregationPipelineProcessor
  {
    #region Constructor
    public PageEventProcessor()
    {
    }
    #endregion

    #region Processor
    /// <summary>
    /// Called when [process].
    /// </summary>
    /// <param name="args">The arguments.</param>
    protected override void OnProcess(InteractionAggregationPipelineArgs args)
    {
      //var useragent = args.Context.Interaction.UserAgent;
      var contact = args.Context.Contact;
      var interaction = args.Context.Interaction;

      var debugText = "Aggregation, PageEventProcessor.OnProcess()";

      if (contact == null)
      {
        Log.Fatal($"{debugText}: args.Context.Contact is null", this);
        return;
      }

      //var isKnownContact = contact.Identifiers.Any(c => c.IdentifierType == ContactIdentifierType.Known); 
    }
  }
  #endregion
}