boolean isBuiltin(Class clazz) {
        return clazz == null ? false
                             : builtin.contains(clazz.getName());
    }
boolean isBuiltin ( Class clazz ) { return clazz == null ? false : builtin . contains ( clazz . getName ( ) ) ; }
Retrieves whether the indicated Class object is systematically
granted to PUBLIC in support of core operation. <p>

@return whether the indicated Class object is systematically
granted to PUBLIC in support of core operation
@param clazz The Class object for which to make the determination