void error(string $string) Write a string as error output.

string choice(string $question, array $choices, string $default = null, mixed $attempts = null, bool $multiple = null)

string ask(string $question, string $default = null) Prompt the user for

void __construct(Filesystem $files)

void comment(string $string, null|int|string $verbosity = null) Write a

string askWithCompletion(string $question, array $choices, string $default = null)

int callSilent(string $command, array $arguments = array()) Call another

string|array option(string $key = null) Get the value of a command option

void line(string $string) Write a string as standard output.

int callSilent(string $command, array $arguments = array()) Call another