Related Class Properties _pathKey _stats _valid Class Methods _init __get export sync _relation _getNested __set _setNested __isset __unset set offsetGet offsetSet offsetExists offsetUnset rewind valid current key to next increment Extends lithium\data\Entity If this `Document` instance has a parent document (see `$_parent`), this value indicates the key name of the parent document that contains it. Related lithium\data\entity\Document::$_parent