string|array argument(string $key = null) Get the value of a command argument
void warn(string $string) Write a string as warning output.
string askWithCompletion(string $question, array $choices, string $default = null)
int callSilent(string $command, array $arguments = array()) Call another
string choice(string $question, array $choices, string $default = null, mixed $attempts = null, bool $multiple = null)
void table(array $headers, Arrayable|array $rows,
string|array option(string $key = null) Get the value of a command option
bool hasOption(string $name) Determine if the given option is present.
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