self-alignment-X on DynamicTextSpanner?

[Simon Albrecht]

Hi List,

is there an equivalent to self-alignment-X for the left bound text of a 
DynamicTextSpanner? See below.

Best, Simon

\version "2.23.5"

{
  1-\tweak self-alignment-X 1 \fff
  1
  % this causes alignment to just fail indiscriminately
  % (not a surprise, because I couldn’t find out how to use this property)
  %-\tweak left-bound-info.self-alignment-X 0
  % this is simply an offset against the default placement (default 
#'(-.75 . -.5))
  %-\tweak bound-details.left.stencil-offset #'(-3 . 0)
  % I’m not sure what this does at all
  %-\tweak bound-details.left.attach-dir -3
  \cresc
  1
  1
  1
  1\!
}