How to set MText background in MultiLeader Mtext Builder

[sschroederSNL]

I can't figure out the correct method to set the background of the MText in my multileader. I tried directly setting them through the context, but the context is only a MTextData object, and the changes don't render. There doesn't seem to be a way to set the MText parameters with this constructor.

add_multileader_mtext(style: str = 'Standard', dxfattribs=None)→[MultiLeaderMTextBuilder]

ideal label

what the below code produces

LEADER_ATTRIBUTES = {
      "layer": DIM_LAYER,
      "text_style_handle":"LeaderStyle"
  }    
  multileader_builder = msp.add_multileader_mtext("Standard", LEADER_ATTRIBUTES)
  multileader_builder.context.mtext.text_color = 0  # black text
  multileader_builder.context.mtext.bg_fill = 2  # solid fill
  multileader_builder.context.mtext.bg_fill_color = 7  # white background
  multileader_builder.set_content(
      content=structure_text,
      char_height=STRUCTURE_TEXT_HEIGHT,
      alignment=mleader.TextAlignment.left  # Position leader to the right of text
  )

  multileader_builder.add_leader_line(mleader.ConnectionSide.right, [Vec2(best_center[0], best_center[1])])


  multileader_builder.build(
      insert=Vec2(text_position[0], text_position[1]), 
      rotation=math.degrees(text_rotation)
  )