fix readme

README.md

@@ -63,85 +63,6 @@ class TestEntity implements LTreeEntityInterface
     {
         $this->children = new ArrayCollection();
     }
-
-    /**
-     * @inheritDoc
-     */
-    public function setParent($parent)
-    {
-        $this->parent = $parent;
-
-        return $this;
-    }
-
-    /**
-     * @inheritDoc
-     */
-    public function getParent()
-    {
-        return $this->parent;
-    }
-
-    /**
-     * @inheritDoc
-     */
-    public function getPath(): array
-    {
-        return $this->path ?: [];
-    }
-
-    /**
-     * @inheritDoc
-     */
-    public function setPath(?array $path): self
-    {
-        $this->path = $path;
-        return $this;
-    }
-
-    /**
-     * @inheritDoc
-     */
-    public function getLevel(): int
-    {
-        return count($this->getPath());
-    }
-
-    /**
-     * @inheritDoc
-     */
-    public function addChildren($child)
-    {
-        if (!$this->children->contains($child)) {
-            $this->children[] = $child;
-            $child->setParent($this);
-        }
-
-        return $this;
-    }
-
-    /**
-     * @inheritDoc
-     */
-    public function removeChildren($child)
-    {
-        if ($this->children->contains($child)) {
-            $this->children->removeElement($child);
-            if ($child->getParent() === $this) {
-                $child->setParent(null);
-            }
-        }
-
-        return $this;
-    }
-
-    /**
-     * @inheritDoc
-     */
-    public function getChildren()
-    {
-        return $this->children;
-    }
 }
 ```