/**
* Sets the child Scope for this Directive.
*
* Sets the child Scope for this Directive and also
* sets the $childScope->setParentDirective($this).
*
* @param Scope $childScope
* @return $this
*/
public function setChildScope(Scope $childScope)
{
$this->childScope = $childScope;
if ($childScope->getParentDirective() !== $this) {
$childScope->setParentDirective($this);
}
return $this;
}