configuration.replacePageProcess(FONT_PROCESS, FontValidationProcess.class);
configuration.replacePageProcess(ACTIONS_PROCESS, ActionsValidationProcess.class);
configuration.replacePageProcess(ANNOTATIONS_PROCESS, AnnotationValidationProcess.class);
configuration.actionFact = new ActionManagerFactory();
configuration.annotFact = new PDFAbAnnotationFactory();
configuration.colorSpaceHelperFact = new ColorSpaceHelperFactory();
return configuration;
}