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

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

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

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

array arguments() Get all of the arguments passed to the command.

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

void info(string $string) Write a string as information output.

OutputInterface getOutput() Get the output implementation.

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

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