name : DelegatedMacroable.php <?php namespace Maatwebsite\Excel; use Illuminate\Support\Traits\Macroable; trait DelegatedMacroable { use Macroable { __call as __callMacro; } /** * Dynamically handle calls to the class. * * @param string $method * @param array $parameters * @return mixed */ public function __call($method, $parameters) { if (method_exists($this->getDelegate(), $method)) { return call_user_func_array([$this->getDelegate(), $method], $parameters); } array_unshift($parameters, $this); return $this->__callMacro($method, $parameters); } /** * @return object */ abstract public function getDelegate(); }