public function setFunctionPhase(ChildFunctionPhase $v = null)
    {
        $this->singleFunctionPhase = $v;

        // Make sure that that the passed-in ChildFunctionPhase isn't already associated with this object
        if ($v !== null && $v->getStructureNode(null, false) === null) {
            $v->setStructureNode($this);
        }

        return $this;
    }