src/vs/workbench/api/common/extHostTextEditor.ts/TextEditorEdit/setEndOfLine
class TextEditorEdit:	setEndOfLine(endOfLine: EndOfLine): void {
		this._throwIfFinalized();
		if (endOfLine !== EndOfLine.LF && endOfLine !== EndOfLine.CRLF) {
			throw illegalArgument('endOfLine');
		}

		this._setEndOfLine = endOfLine;
	}