diff --git a/src/ext/spout/SpoutBuilder.php b/src/ext/spout/SpoutBuilder.php
index b7d8b2f..f77bb80 100644
--- a/src/ext/spout/SpoutBuilder.php
+++ b/src/ext/spout/SpoutBuilder.php
@@ -29,8 +29,14 @@ class SpoutBuilder extends AbstractBuilder {
   protected static function apply_params($object, ?array $params, array $refParams) {
     foreach (array_keys($refParams) as $method) {
       if (!str::starts_with("->", $method)) continue;
-      if (cl::has($params, $method)) {
-        func::with([$object, $method])->invoke(cl::with($params[$method]));
+      $func = func::with([$object, $method]);
+      if (($args = $params[$method] ?? null) !== null) {
+        $func->invoke(cl::with($args));
+      }
+      if (($argss = $params["$method*"] ?? null) !== null) {
+        foreach ($argss as $args) {
+          $func->invoke(cl::with($args));
+        }
       }
     }
     return $object;
@@ -314,6 +320,14 @@ class SpoutBuilder extends AbstractBuilder {
     return $this;
   }
 
+  /**
+   * les colonnes sont indexées sur 0 (e.g A = 0, B = 1, etc.)
+   * Les lignes sont indexées sur 1
+   */
+  function mergeCells(int $topLeftCol, int $topLeftRow, int $bottomRightCol, int $bottomRightRow): void {
+    $this->ssWriter->mergeCells([$topLeftCol, $topLeftRow], [$bottomRightCol, $bottomRightRow]);
+  }
+
   protected function isNumeric($value): bool {
     if ($this->typeNumeric && is_numeric($value)) return true;
     if (!is_string($value) && is_numeric($value)) return true;