code: def label_ref_node(docname, ref_to, title):
      
      txt = Text(title, rawsource=title)
      newchild = inline(
          ':ref:`%s`' % ref_to,
          '',
          txt,
          classes=['xref', 'std', 'std-ref']
      )
      newnode = pending_xref(
          ':ref:`%s`' % ref_to,
          newchild,
          reftype='ref',
          refwarn='True',
          reftarget=ref_to,
          refexplicit='False',
          refdomain='std',
          refdoc=docname
      )
      return newnode
docs: Generate a node that references a label