code: def dlabbs(handle):
      
      handle = ctypes.c_int(handle)
      descr  = stypes.SpiceDLADescr()
      found  = ctypes.c_int()
      libspice.dlabbs_c(handle, ctypes.byref(descr), ctypes.byref(found))
      return descr, bool(found.value)
docs: Begin a backward segment search in a DLA file.
      
      https://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/dlabbs_c.html
      
      :param handle: Handle of open DLA file.
      :type handle: int
      :return: Descriptor of last segment in DLA file
      :rtype: spiceypy.utils.support_types.SpiceDLADescr