def breakpoint_info(self, handle=0, index=-1):
        """Returns the information about a set breakpoint.

        Note:
          Either ``handle`` or ``index`` can be specified.  If the ``index``
          is not provided, the ``handle`` must be set, and vice-versa.  If
          both ``index`` and ``handle`` are provided, the ``index`` overrides
          the provided ``handle``.

        Args:
          self (JLink): the ``JLink`` instance
          handle (int): option handle of a valid breakpoint
          index (int): optional index of the breakpoint.

        Returns:
          An instance of ``JLinkBreakpointInfo`` specifying information about
          the breakpoint.

        Raises:
          JLinkException: on error.
          ValueError: if both the handle and index are invalid.
        """
        if index < 0 and handle == 0:
            raise ValueError('Handle must be provided if index is not set.')

        bp = structs.JLinkBreakpointInfo()
        bp.Handle = int(handle)
        res = self._dll.JLINKARM_GetBPInfoEx(index, ctypes.byref(bp))
        if res < 0:
            raise errors.JLinkException('Failed to get breakpoint info.')

        return bp