[issue-9926] make the internal fromProperty() private

Author: mitchnull

modules/swagger-codegen/src/main/java/io/swagger/codegen/DefaultCodegen.java

@@ -1606,7 +1606,7 @@ public CodegenProperty fromProperty(String name, Property p) {
      * @param itemsDepth the depth in nested containers or null
      * @return Codegen Property object
      */
-    protected CodegenProperty fromProperty(String name, Property p, Integer itemsDepth) {
+    private CodegenProperty fromProperty(String name, Property p, Integer itemsDepth) {
         if (p == null) {
             LOGGER.error("unexpected missing property for name " + name);
             return null;