constructor(
		exportsArgument,
		exportMap = EMPTY_MAP,
		unusedExports = EMPTY_SET
	) {
		super(undefined, InitFragment.STAGE_HARMONY_EXPORTS, 1, "harmony-exports");
		this.exportsArgument = exportsArgument;
		this.exportMap = exportMap;
		this.unusedExports = unusedExports;
	}
@param {string} exportsArgument the exports identifier
@param {Map<string, string>} exportMap mapping from used name to exposed variable name
@param {Set<string>} unusedExports list of unused export names