add -- option withFlatten

Author: phoenix

readme.md

@@ -61,7 +61,8 @@ Here are a few customization options
 - `->withPlaceholder(string $placeholder)` // - placeholder in tree select
 - `->withMaxHeight(int $maxHeight)`
 - `->withSortValueBy(string $sortBy)` // - @see https://vue-treeselect.js.org/#flat-mode-and-sort-values
-- `->withAlwaysOpen(boot $alwaysOpen)` // - by default select is open, but you can change it behavior
+- `->withAlwaysOpen(bool $alwaysOpen)` // - by default select is open, but you can change it behavior
+- `->withFlatten(bool $flatten)` // - by default flatten is enabled, but you can change it behavior
 - `->useSingleSelect()` // - ability for select only one value
 
 

src/NestedTreeAttachManyField.php

@@ -163,6 +163,15 @@ public function withSortValueBy(string $sortBy): NestedTreeAttachManyField
         return $this;
     }
 
+    public function withFlatten(bool $flatten): NestedTreeAttachManyField
+    {
+        $this->withMeta([
+            'flatten' => $flatten,
+        ]);
+
+        return $this;
+    }
+
     public function useSingleSelect(): NestedTreeAttachManyField
     {
         $this->withMeta([