OutputInterface getOutput() Get the output implementation.

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

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

void warn(string $string) Write a string as warning output.

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

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

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

void line(string $string, string $style = null, null|int|string $verbosity = null)

int run(InputInterface $input, OutputInterface $output) Run the console

string secret(string $question, bool $fallback = true) Prompt the user