@Override
                        public ConfigDefinition parse() {
                            DefParser parser = new DefParser(defKey.getName(), new StringReader(def.contents));
                            return ConfigDefinitionBuilder.createConfigDefinition(parser.getTree());
                        }
Creates a reader for a config definition

@param defPath the path to the application package
@return the reader of this config definition
config-application-package/src/main/java/com/yahoo/config/model/application/provider/FilesApplicationPackage.java