import { Question, SurveyDefinition, SurveyRenderOptions, SurveyScreen, SurveyState, SurveyValues, TranslatedSurveyField } from '../base';
export declare function getScreens(survey: SurveyDefinition, values: SurveyValues, renderOptions: SurveyRenderOptions, navigation: boolean): SurveyScreen[];
export declare function screenIndexForField(screens: SurveyScreen[], fieldId: string | undefined): number;
export declare function getScreenIndex(screens: SurveyScreen[], fieldId: string | undefined, currentIndex: number): number;
export declare function isThankYouScreen(screen: SurveyScreen, survey: SurveyDefinition): boolean;
export declare function isScreenValid(screen: SurveyScreen, surveyState: SurveyState): boolean;
export declare function isFieldRequired(field: TranslatedSurveyField): boolean;
export declare function isFieldQuestion(field: TranslatedSurveyField): field is Question;