public function setObject(ChildObject $v = null)
    {
        // aggregate_column_relation behavior
        if (null !== $this->aObject && $v !== $this->aObject) {
            $this->oldObjectSkillCount = $this->aObject;
        }
        if ($v === null) {
            $this->setObjectId(NULL);
        } else {
            $this->setObjectId($v->getId());
        }

        $this->aObject = $v;

        // Add binding for other direction of this n:n relationship.
        // If this object has already been added to the ChildObject object, it will not be re-added.
        if ($v !== null) {
            $v->addSkill($this);
        }


        return $this;
    }