override method to verify alias classes.

Author: HugoMario

src/main/java/io/swagger/codegen/v3/generators/dotnet/AbstractCSharpCodegen.java

@@ -1081,6 +1081,11 @@ protected void addCodegenContentParameters(CodegenOperation codegenOperation, Li
             addParameters(content, codegenOperation.pathParams);
         }
     }
+
+    @Override
+    public boolean checkAliasModel() {
+        return true;
+    }
 /*
     TODO: uncomment if/when switching to stream for file upload
     @Override

src/main/java/io/swagger/codegen/v3/generators/go/AbstractGoCodegen.java

@@ -583,4 +583,9 @@ public CodegenModel fromModel(String name, Schema schema, Map<String, Schema> al
     public ISchemaHandler getSchemaHandler() {
         return new GoSchemaHandler(this);
     }
+
+    @Override
+    public boolean checkAliasModel() {
+        return true;
+    }
 }

src/main/java/io/swagger/codegen/v3/generators/java/AbstractJavaCodegen.java

@@ -1522,4 +1522,9 @@ public void setLanguageArguments(List<CodegenArgument> languageArguments) {
     public boolean defaultIgnoreImportMappingOption() {
         return true;
     }
+
+    @Override
+    public boolean checkAliasModel() {
+        return true;
+    }
 }