Method setError

/**
 * Set error object
 *
 * @param   \Throwable  $error  Error object to set
 *
 * @return  boolean  True on success
 *
 * @since   1.7.0
 */
public function setError($error)
{
    if ($error instanceof \Throwable) {
        $this->_error =& $error;
        return true;
    }
    return false;
}