/**
 * @fileoverview
 * This test suite verifies the functionality of the CoreConverter class
 * in conjunction with the JapaneseLanguagePlugin. It checks conversion
 * of numbers (including decimal and BigInt), dates (Gregorian),
 * and times ("HH:mm"). Various edge cases such as invalid formats, out-of-range values,
 * custom separators, and custom words are also tested.
 */
export {};