public function addFunctionPhaseRelatedBySkillId(ChildFunctionPhase $l)
    {
        if ($this->collFunctionPhasesRelatedBySkillId === null) {
            $this->initFunctionPhasesRelatedBySkillId();
            $this->collFunctionPhasesRelatedBySkillIdPartial = true;
        }

        if (!$this->collFunctionPhasesRelatedBySkillId->contains($l)) {
            $this->doAddFunctionPhaseRelatedBySkillId($l);
        }

        return $this;
    }