ZoneCodeGenerator: Add Computations class for StructureInformation including IsUsed to check whether a structure has at least 1 usage

src/ZoneCodeGenerator/Domain/Information/StructureInformation.cs

@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.Linq;
 using ZoneCodeGenerator.Domain.FastFileStructure;
+using ZoneCodeGenerator.Generating.Computations;
 using ZoneCodeGenerator.Persistence;
 
 namespace ZoneCodeGenerator.Domain.Information
@@ -33,6 +34,7 @@ namespace ZoneCodeGenerator.Domain.Information
         public bool IsLeaf { get; set; }
 
         public List<MemberInformation> NameChain { get; set; }
+        public StructureComputations Computations => new StructureComputations(this);
 
         public StructureInformation(DataTypeWithMembers type)
         {

src/ZoneCodeGenerator/Generating/Computations/StructureComputations.cs

@@ -0,0 +1,20 @@
+using System.Collections.Generic;
+using System.Linq;
+using ZoneCodeGenerator.Domain;
+using ZoneCodeGenerator.Domain.Evaluation;
+using ZoneCodeGenerator.Domain.Information;
+
+namespace ZoneCodeGenerator.Generating.Computations
+{
+    class StructureComputations
+    {
+        private readonly StructureInformation information;
+
+        public bool IsUsed => information.Usages.Any();
+
+        public StructureComputations(StructureInformation information)
+        {
+            this.information = information;
+        }
+    }
+}