def FilterIssueTypes(config):
  """Return a list of well-known issue types."""
  well_known_issue_types = []
  for wk_label in config.well_known_labels:
    if wk_label.label.lower().startswith('type-'):
      _, type_name = wk_label.label.split('-', 1)
      well_known_issue_types.append(type_name)

  return well_known_issue_types