Bug found getMappingSources() is not implemented

I Found a Bug in FeedsTopicParser.inc

the function getMappingSources() was not implemented

the module doesnt work

i fixed it for the moment manually

with code:

/**
   * Add the extra mapping sources provided by this parser.
   */
  public function getMappingSources() {
    return parent::getMappingSources() + array(      
      'title' => array(
        'title' => t('Title')
      ),
      'url' => array(
        'url' => t('URL')
      )

    );
  }

now it works

I can fix it completely

but i am a newbie in drupal Community and i dont know how i can help in this project

please tell me how i can help