Find the methods that evaluate data that meets this condition.

    Args:
      conditions: A tuple of (artifact, os_name, cpe, label)

    Returns:
      A list of methods that evaluate the data.

def Calls(self, conditions=None):
    """Find the methods that evaluate data that meets this condition.

    Args:
      conditions: A tuple of (artifact, os_name, cpe, label)

    Returns:
      A list of methods that evaluate the data.
    """
    results = set()
    if conditions is None:
      conditions = [None]
    for condition in conditions:
      for c in self.Match(*condition):
        results.update(self._registry.get(c, []))
    return results