DX: mark some functions as pure

src/Bundle/ChillMainBundle/Templating/Entity/ChillEntityRenderInterface.php

@@ -32,6 +32,7 @@ interface ChillEntityRenderInterface
      * ```
      *
      * @param T $entity
+     * @phpstan-pure
      */
     public function renderBox($entity, array $options): string;
 
@@ -41,11 +42,14 @@ interface ChillEntityRenderInterface
      * Example: returning the name of a person.
      *
      * @param T $entity
+     * @phpstan-pure
      */
     public function renderString($entity, array $options): string;
 
     /**
      * Return true if the class support this object for the given options.
+     *
+     * @phpstan-pure
      */
     public function supports(object $entity, array $options): bool;
 }