Unable to figure out how to set page margins on document about unioffice HOT 3 CLOSED

  // AddTabStop adds a tab stop to the paragraph.
  func (p ParagraphStyleProperties) AddTabStop(position measurement.Distance, justificaton wml.ST_TabJc, leader w  ml.ST_TabTlc) {
          if p.x.Tabs == nil {
                  p.x.Tabs = wml.NewCT_Tabs()
          }
          tab := wml.NewCT_TabStop()
          tab.LeaderAttr = leader
          tab.ValAttr = justificaton
          tab.PosAttr.Int64 = gooxml.Int64(int64(position / measurement.Twips))
          p.x.Tabs.Tab = append(p.x.Tabs.Tab, tab)
  }