Added Declaration.IsExplicitlyGenerated.

src/AST/Declaration.cs

@@ -215,6 +215,18 @@ namespace CppSharp.AST
             }
         }
 
+        /// <summary>
+        /// Whether the declaration was explicitly set to be generated via
+        /// the GenerationKind propery as opposed to its default generated state.
+        /// </summary>
+        public virtual bool IsExplicitlyGenerated
+        {
+            get
+            {
+                return generationKind.HasValue && generationKind.Value == GenerationKind.Generate;
+            }
+        }
+
         /// <summary>
         /// Whether the declaration internal bindings should be generated.
         /// </summary>