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

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

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

ListFailedCommand class ListFailedCommand extends

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

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

OutputInterface getOutput() Get the output implementation.

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

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

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