fix version converter for code systems

org.hl7.fhir.convertors/src/main/java/org/hl7/fhir/convertors/loaders/loaderR5/R2016MayToR5Loader.java

@@ -151,4 +151,10 @@ public class R2016MayToR5Loader extends BaseLoaderR5 {
       }
     }
   }
+
+  @Override
+  public List<CodeSystem> getCodeSystems() {
+    return new ArrayList<>();
+  }
+
 }

org.hl7.fhir.convertors/src/main/java/org/hl7/fhir/convertors/loaders/loaderR5/R2ToR5Loader.java

@@ -122,9 +122,6 @@ public class R2ToR5Loader extends BaseLoaderR5 implements IContextResourceLoader
       r2 = new XmlParser().parse(stream);
     org.hl7.fhir.r5.model.Resource r5 = VersionConvertorFactory_10_50.convertResource(r2, advisor);
     setPath(r5);
-    if (!advisor.getCslist().isEmpty()) {
-      throw new FHIRException("Error: Cannot have included code systems");
-    }
     if (killPrimitives) {
       throw new FHIRException("Cannot kill primitives when using deferred loading");
     }
@@ -152,4 +149,15 @@ public class R2ToR5Loader extends BaseLoaderR5 implements IContextResourceLoader
       }
     }
   }
+  
+  @Override
+  public List<CodeSystem> getCodeSystems() {
+    List<CodeSystem> list = new ArrayList<>();
+    if (!advisor.getCslist().isEmpty()) {
+      list.addAll(advisor.getCslist());
+      advisor.getCslist().clear();
+    }
+    return list;
+  }
+
 }

org.hl7.fhir.convertors/src/main/java/org/hl7/fhir/convertors/loaders/loaderR5/R3ToR5Loader.java

@@ -153,4 +153,10 @@ public class R3ToR5Loader extends BaseLoaderR5 implements IContextResourceLoader
       }
     }
   }
+  
+  @Override
+  public List<CodeSystem> getCodeSystems() {
+    return new ArrayList<>();
+  }
+
 }

org.hl7.fhir.convertors/src/main/java/org/hl7/fhir/convertors/loaders/loaderR5/R4BToR5Loader.java

@@ -160,4 +160,11 @@ public class R4BToR5Loader extends BaseLoaderR5 implements IContextResourceLoade
       }
     }
   }
+  
+  @Override
+  public List<CodeSystem> getCodeSystems() {
+    return new ArrayList<>();
+  }
+
+
 }

org.hl7.fhir.convertors/src/main/java/org/hl7/fhir/convertors/loaders/loaderR5/R4ToR5Loader.java

@@ -160,4 +160,11 @@ public class R4ToR5Loader extends BaseLoaderR5 implements IContextResourceLoader
       }
     }
   }
+  
+  @Override
+  public List<CodeSystem> getCodeSystems() {
+    return new ArrayList<>();
+  }
+
+
 }

org.hl7.fhir.convertors/src/main/java/org/hl7/fhir/convertors/loaders/loaderR5/R5ToR5Loader.java

@@ -151,4 +151,11 @@ public class R5ToR5Loader extends BaseLoaderR5 {
       }
     }
   }
+  
+  @Override
+  public List<CodeSystem> getCodeSystems() {
+    return new ArrayList<>();
+  }
+
+
 }