question: @ SuppressWarnings ( "unchecked" ) public static void registerAtStart ( String className ) { JavaUtils . checkRegisterPermission ( ) ; try { Class < ResourceResolverSpi > resourceResolverClass = ( Class < ResourceResolverSpi > ) Class . forName ( className ) ; register ( resourceResolverClass , true ) ; } catch ( ClassNotFoundException e ) { log . log ( java . util . logging . Level . WARNING , "Error loading resolver " + className + " disabling it" ) ; } }
target:  Registers a ResourceResolverSpi class at the beginning of the provider list. This method logs a warning if the class cannot be registered.