src/vs/base/common/extpath.ts/hasDriveLetter
export function hasDriveLetter(path: string, continueAsWindows?: boolean): boolean {
	const isWindowsPath: boolean = ((continueAsWindows !== undefined) ? continueAsWindows : isWindows);
	if (isWindowsPath) {
		return isWindowsDriveLetter(path.charCodeAt(0)) && path.charCodeAt(1) === CharCode.Colon;
	}

	return false;
}