Applescript & Garageband track segments

Does anyone know if and how to manipulate segments of a track using Applescript? That is, what would Applescript call a segment of a track? I am hoping it would be possible to code something like the following:

=====NOTE: NOT A REAL SCRIPT=====

tell application "Garageband" to delete track segment 5 of document 1

================================

This imaginary script above uses the term 'track segment' as an example. I'm trying to find out if there is such an object in garageband for Applescript.

This is all I've got on the subject:

trtrack n [inh. item] : Tracks in a song

elements

contained by songs.

properties

instrument name (text, r/o) : Instrument name of a track

locked (integer, r/o) : Is the track locked?

muted (boolean, r/o) : Is the track muted?

pan (integer, r/o) : Panning of the track

real instrument (boolean, r/o) : Is the track a real instrument track?

record enabled (boolean, r/o) : Is record enabled on this track?

selected (boolean, r/o) : Is the track selected?

software instrument (boolean, r/o) : Is the track a software instrument?

soloed (boolean, r/o) : Is the track soloed?

stereo (boolean, r/o) : Is this a stereo track?

track volume (real, r/o) : Volume of the track