type UnsupportedConfigVersionError … // Error implements the standard Golang error interface for UnsupportedConfigVersionError func (err *UnsupportedConfigVersionError) Error() string { … } type UnsupportedConfigVersionsErrorMap … // Error implements the standard Golang error interface for UnsupportedConfigVersionsErrorMap func (errs UnsupportedConfigVersionsErrorMap) Error() string { … } // warnDefaultComponentConfigValue prints a warning if the user modified a field in a certain // ComponentConfig from the default recommended value in kubeadm. func warnDefaultComponentConfigValue(componentConfigKind, paramName string, defaultValue, userValue interface{ … }