Date Validators

function check_date_input(date_object: any, default_date: any): any;

function check_extracted_reference(reference: any, options: any): string;

function compare_values(
   reference: any, 
   attempt: any, 
   options: any): any;

function convert_date(
   datestring: any, 
   inputformat: any, 
   outputformat: any): any;

function filter_ymd_candidate(
   bestmatch: any, 
   pattern: any, 
   original_date: any, 
   copyear: any, 
   outputformat: any, 
   min_date: any, 
   max_date: any): any;

function get_max_date(max_date: any): any;

function get_min_date(min_date: any): any;

function is_valid_date(
   date_input: any, 
   outputformat: any, 
   earliest: any, 
   latest: any): boolean;

function is_valid_format(outputformat: any): boolean;

function plausible_year_filter(
   htmlstring: any, 
   pattern: any, 
   yearpat: any, 
   earliest: any, 
   latest: any, 
   incomplete: boolean): Map<any, any>;