How to use the markdownlint-rule-helpers.applyFix function in markdownlint-rule-helpers

return new Promise((resolve, reject) => {
		const editor = vscode.window.activeTextEditor;
		if (editor && fixInfo) {
			const document = editor.document;
			const lineNumber = fixInfo.lineNumber || (lineIndex + 1);
			const {text, range} = document.lineAt(lineNumber - 1);
			const fixedText = markdownlintRuleHelpers.applyFix(text, fixInfo, "\n");
			return editor.edit((editBuilder) => {
				if (typeof fixedText === "string") {
					editBuilder.replace(range, fixedText);
				} else {
					let deleteRange = range;
					if (lineNumber === 1) {
						if (document.lineCount > 1) {
							const nextLine = document.lineAt(range.end.line + 1);
							deleteRange = range.with({"end": nextLine.range.start});
						}
					} else {
						const previousLine = document.lineAt(range.start.line - 1);
						deleteRange = range.with({"start": previousLine.range.end});
					}
					editBuilder.delete(deleteRange);
				}