PhutilArrayClassAbstract base class for implementing objects that behave like arrays. This
class wraps a basic array and provides trivial implementations for
`Countable`, `ArrayAccess` and `Iterator`, so subclasses need only implement
specializations.PhutilArrayClassAbstract base class for implementing objects that behave like arrays. This
class wraps a basic array and provides trivial implementations for
`Countable`, `ArrayAccess` and `Iterator`, so subclasses need only implement
specializations.