$optionalSettings = [
'descBaseUrl', 'scriptDirUrl', 'articleUrl', 'fetchDescription',
'thumbScriptUrl', 'pathDisclosureProtection', 'descriptionCacheExpiry',
$optionalSettings = [
'descBaseUrl', 'scriptDirUrl', 'articleUrl', 'fetchDescription',
'thumbScriptUrl', 'pathDisclosureProtection', 'descriptionCacheExpiry',