From Joomla! Documentation
The "API15" namespace is an archived namespace. This page contains information for a Joomla! version which is no longer supported. It exists only as a historical reference, it will not be improved and its content may be incomplete and/or contain broken links.
JClientHelper is a helper class to get, set and check for client credentials.
|getCredentials||Method to return the array of client layer configuration options|
|setCredentials||Method to set client login credentials|
|hasCredentials||Method to determine if client login credentials are present|
|setCredentialsFromRequest||Determine wether input fields for client settings need to be shown|
jimport( 'joomla.client.helper' );