string|array option(string $key = null) Get the value of a command option
array arguments() Get all of the arguments passed to the command.
int call(string $command, array $arguments = array()) Call another console
void question(string $string, null|int|string $verbosity = null) Write
bool confirm(string $question, bool $default = false) Confirm a question
void error(string $string, null|int|string $verbosity = null) Write a string
void warn(string $string) Write a string as warning output.
void info(string $string, null|int|string $verbosity = null) Write a string
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