protected synchronized void unbind(AnnotatedFieldMapper<?, ?> mapper) {
        if (mapper == null) {
            return;
        }
        this.state.getAndIncrement();
        this.fieldMappers.removeValue(mapper);
        this.cache.clear();
    }
protected synchronized void unbind ( AnnotatedFieldMapper < ? , ? > mapper ) { if ( mapper == null ) { return ; } this . state . getAndIncrement ( ) ; this . fieldMappers . removeValue ( mapper ) ; this . cache . clear ( ) ; }
@param mapper must not be <code>null</code>.