Method setExtensions

/**
 * Retrieves the extension from the model and sets the class variable
 *
 * @param   null  $extensions  Array of extensions
 *
 * @return void
 *
 * @since 4.0.0
 */
public function setExtensions($extensions = null) : void
{
    if (!$extensions) {
        $this->extensions = $this->getAllExtensionsFromDB();
    } else {
        $this->extensions = $extensions;
    }
}