writeln(string|array $messages, int $options) Writes a message to the output and adds a newline at

class Application An Application is the container for a collection of commands. It is the

Question setValidator(callable $validator

bool isEnabled() Checks whether the command is enabled or not in the current environment.

string getSynopsis(bool $short = false) Gets the synopsis.

setOption(string $name, string|bool $value) Sets an option value by name.

setDefinition(InputDefinition $definition)

setRow($column, array $row) Parameters $column

addOption(InputOption $option)

string getSynopsis(bool $short = false) Returns the synopsis for the command.