src/Upload.php
public function isUploadField($key)
    {
        return array_key_exists($key, $this->uploadGetKeys) || array_key_exists($key, $this->uploadSetKeys);
    }
public function isUploadField($key)
    {
        return array_key_exists($key, $this->uploadGetKeys) || array_key_exists($key, $this->uploadSetKeys);
    }
public function isUploadField ( $ key ) { return array_key_exists ( $ key , $ this -> uploadGetKeys ) || array_key_exists ( $ key , $ this -> uploadSetKeys ) ; }
Determine if a set mutator exists for an attribute.

@param string $key

@return bool
Determine if a set mutator exists for an attribute .