update

src/Form.php

@@ -1134,7 +1134,7 @@ class Form implements Renderable
      *
      * @param bool|\Closure $condition
      *
-     * @return Condition|$this
+     * @return Condition
      */
     public function if($condition)
     {

src/Form/Condition.php

@@ -4,6 +4,9 @@ namespace Dcat\Admin\Form;
 
 use Dcat\Admin\Form;
 
+/**
+ * @mixin Form
+ */
 class Condition
 {
     /**

src/Grid/Column.php

@@ -271,7 +271,7 @@ class Column
      *         })
      *
      * @param \Closure $condition
-     * @return Column\Condition|$this
+     * @return Column\Condition
      */
     public function if(\Closure $condition)
     {

src/Grid/Column/Condition.php

@@ -4,6 +4,9 @@ namespace Dcat\Admin\Grid\Column;
 
 use Dcat\Admin\Grid\Column;
 
+/**
+ * @mixin Column
+ */
 class Condition
 {
     /**