import type { DefaultOperatorName, Field, OptionGroup, ValueSources } from '../types/index.noReact';
export declare const getFieldsArray: (fields?: Field[] | OptionGroup<Field>[] | Record<string, Field>) => Field[];
export declare function fieldIsValidUtil({ fieldsFlat, fieldName, operator, subordinateFieldName, getValueSources, }: {
    fieldsFlat: Field[];
    getValueSources?: (field: string, operator: string) => ValueSources;
    fieldName: string;
    operator: DefaultOperatorName;
    subordinateFieldName?: string;
}): boolean;