在我的實體中的一個方法中，我使用了一個參數“addlinkedDocuments”。class Documents {  /**  * Many Documents link to many Documents.  * @ORM\ManyToMany(targetEntity="App\Entity\Documents", fetch="EAGER")  * @ORM\JoinTable(name="documents_documents",  *      joinColumns={@JoinColumn(name="link_origin", referencedColumnName="id")},  *      inverseJoinColumns={@JoinColumn(name="link_destination", referencedColumnName="id")}  *      )  * @Groups("documents")  */  private $linkedDocuments;  public function __construct() {    $this->linkedDocuments = new ArrayCollection();  }  /**  * @return Collection|linkedDocuments[]  */  public function getlinkedDocuments(): Collection  {    return $this->linkedDocuments;  }  public function addlinkedDocuments(linkedDocuments $linkedDocuments): self  {    if (!$this->linkedDocuments->contains($linkedDocuments)) {      $this->linkedDocuments[] = $linkedDocuments;    }    return $this;  }  public function removelinkedDocuments(linkedDocuments $linkedDocuments): self  {    if ($this->linkedDocuments->contains($linkedDocuments)) {      $this->linkedDocuments->removeElement($linkedDocuments);    }    return $this;  }但我收到錯誤消息：類“App\Entity\Documents”中方法“addlinkedDocuments”中參數“linkedDocuments”的類型提示無效。