Add overrides to GeocodeLocations cache

GeocodeLocations.cs

@@ -1,4 +1,5 @@
-using System.Collections.Concurrent;
+using System;
+using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.IO;
 using System.Net.Http;
@@ -22,13 +23,16 @@ public class GeocodeLocations : Module
 
         // Cache responses for each location
         private readonly ConcurrentDictionary<string, Task<CoordinateAbbreviated>> _coordinateCache =
-            new ConcurrentDictionary<string, Task<CoordinateAbbreviated>>();
+            new ConcurrentDictionary<string, Task<CoordinateAbbreviated>>(StringComparer.OrdinalIgnoreCase);
 
         private readonly Config<string> _subscriptionKey;
 
         public GeocodeLocations(Config<string> subscriptionKey)
         {
             _subscriptionKey = subscriptionKey.ThrowIfNull(nameof(subscriptionKey));
+
+            // Add coordinate overrides to cache
+            _coordinateCache["the netherlands"] = Task.FromResult(new CoordinateAbbreviated { Lat = 52.371807, Lon = 4.896029 });
         }
 
         protected override async Task<IEnumerable<IDocument>> ExecuteInputAsync(IDocument input, IExecutionContext context)