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

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

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

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

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

OutputInterface getOutput() Get the output implementation.

void __construct(Filesystem $files,

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

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

void __construct() Create a new console command instance.