Add ignore_missing to the remove processor (#3441)

Author: Mpdreamz

src/Nest/Ingest/Processors/RemoveProcessor.cs

@@ -1,10 +1,6 @@
 using Newtonsoft.Json;
 using System;
-using System.Collections.Generic;
-using System.Linq;
 using System.Linq.Expressions;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace Nest
 {
@@ -14,25 +10,42 @@ public interface IRemoveProcessor : IProcessor
 	{
 		[JsonProperty("field")]
 		Field Field { get; set; }
+
+		/// <summary>
+		/// If <c>true</c> and <see cref="Field"/> does not exist or is null,
+		/// the processor quietly exits without modifying the document. Default is <c>false</c>
+		/// </summary>
+		[JsonProperty("ignore_missing")]
+		bool? IgnoreMissing { get; set; }
 	}
 
+	/// <inheritdoc cref="IRemoveProcessor" />
 	public class RemoveProcessor : ProcessorBase, IRemoveProcessor
 	{
 		protected override string Name => "remove";
+		/// <inheritdoc cref="IRemoveProcessor.Field" />
 		public Field Field { get; set; }
+		/// <inheritdoc cref="IRemoveProcessor.IgnoreMissing" />
+		public bool? IgnoreMissing { get; set; }
 	}
 
+	/// <inheritdoc cref="IRemoveProcessor" />
 	public class RemoveProcessorDescriptor<T>
 		: ProcessorDescriptorBase<RemoveProcessorDescriptor<T>, IRemoveProcessor>, IRemoveProcessor
 		where T : class
 	{
 		protected override string Name => "remove";
 
 		Field IRemoveProcessor.Field { get; set; }
+		bool? IRemoveProcessor.IgnoreMissing { get; set; }
 
+		/// <inheritdoc cref="IRemoveProcessor.Field" />
 		public RemoveProcessorDescriptor<T> Field(Field field) => Assign(a => a.Field = field);
 
-		public RemoveProcessorDescriptor<T> Field(Expression<Func<T, object>> objectPath) =>
-			Assign(a => a.Field = objectPath);
+		/// <inheritdoc cref="IRemoveProcessor.Field" />
+		public RemoveProcessorDescriptor<T> Field(Expression<Func<T, object>> objectPath) => Assign(a => a.Field = objectPath);
+
+		/// <inheritdoc cref="IRemoveProcessor.IgnoreMissing" />
+		public RemoveProcessorDescriptor<T> IgnoreMissing(bool? ignoreMissing = true) => Assign(a => a.IgnoreMissing = ignoreMissing);
 	}
 }