def METHOD_NAME(self):
    """Returns bond vectors that originate from the central atom."""
    one, two, three, four = self._indices
    acsi = self.getACSIndex()
    vector1 = self._ag._coords[acsi, two] - self._ag._coords[acsi, one]
    vector2 = self._ag._coords[acsi, three] - self._ag._coords[acsi, two]
    vector3 = self._ag._coords[acsi, four] - self._ag._coords[acsi, three]
    return vector1, vector2, vector3