interface LibraryDiscoveryInterface

interface LibraryDiscoveryInterface {
    
    /**
     * Gets all libraries defined by an extension.
     *
     * @param string $extension
     *   The name of the extension that registered a library.
     *
     * @return array
     *   An associative array of libraries registered by $extension is returned
     *   (which may be empty).
     *
     * @see self::getLibraryByName()
     */
    public function getLibrariesByExtension($extension);
    
    /**
     * Gets a single library defined by an extension by name.
     *
     * @param string $extension
     *   The name of the extension that registered a library.
     * @param string $name
     *   The name of a registered library to retrieve.
     *
     * @return array|false
     *   The definition of the requested library, if $name was passed and it
     *   exists, otherwise FALSE.
     */
    public function getLibraryByName($extension, $name);
    
    /**
     * Clears static and persistent library definition caches.
     */
    public function clearCachedDefinitions();

}