bool isNullable() Returns whether the argument accepts null values.

interface ArgumentMetadataFactoryInterface Builds method argument data.

bool isVariadic() Returns whether the argument is defined as ". ..$variadic".

mixed getDefaultValue() Returns the default value of the argument.

string getType() Returns the type of the argument. The type is the PHP class in 5.5+ and

class ArgumentMetadataFactory implements

string getName() Returns the name as given in PHP, $foo would yield "foo".

class ArgumentMetadata Responsible for storing metadata of an argument.

bool hasDefaultValue() Returns whether the argument has a default value. Implies whether