Illuminate\Support\Collection::prepend PHP Method

    public function prepend($value, $key = null)
    {
        $this->items = Arr::prepend($this->items, $value, $key);
        return $this;
    }

 /**
  * Type protection
  *
  * @param mixed $value
  */
 public function prepend($value)
 {
     if ($this->isValidElement($value)) {
         parent::prepend($value);
     } else {
         $this->handleInvalidElement($value);
     }
 }