/**
 * We need to make sure we are setting empty string for values that are null/undefined/empty string - PropertiesReader
 * castes values in some awkward ways and this covers those scenarios AND ensures we have default values set for new
 * config values that may have been added in a previous version (between when user installed HDB and is now upgrading)
 * @param propName
 * @param oldHdbProps
 * @param valueRequired
 * @returns {string|*}
 */
export function getOldPropsValue(propName: any, oldHdbProps: any, valueRequired?: boolean): string | any;
