bool offsetExists(string $name) Returns whether a child with the given name exists (implements

$comment public property (available since version 2.0.8) Comment

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

interface NameConverterInterface Defines the interface for property name converters.

scalar encode(mixed $data, string $format, array $context = array()) Encodes data into the given

QueryInterface createQuery(string

bool isDebug() Returns whether verbosity is debug (-vvv).

setFormatter(

static bool compare(string $version1, string $version2, string $operator, int|null $precision = null)

string|null getCountryName(string $country, string $displayLocale = null) Returns the name of