code: def get_hdr(self, goid, goobj):
          
          hdr = []
          ntgo = self.gosubdag.go2nt.get(goid)
          prt_flds = self._get_prtflds()
          # Add letter to depth-01 GO Node.
          if 'D1' in prt_flds and goobj.depth == 1:
              hdr.append("{ABC} ".format(ABC=ntgo.D1))
          hdr.append(self.str_fmthdr(goid, goobj))
          if 'level' in prt_flds:
              hdr.append("L{level}".format(level=goobj.level))
          if 'depth' in prt_flds:
              hdr.append("D{depth}".format(depth=goobj.depth))
          if 'reldepth' in prt_flds:
              hdr.append("R{reldepth}".format(reldepth=goobj.reldepth))
          # Print count of parents for this GO term
          if 'c2ps' in self.kws:
              self._add_parent_cnt(hdr, goobj, self.kws['c2ps'])
          # Print count of children for this GO term
          childcnt_str = self._get_hdr_childcnt(goobj, ntgo)
          if childcnt_str:
              hdr.append(childcnt_str)
          # Print count of all descendants down to the leaf-level for this GO term
          if 'dcnt' in prt_flds:
              hdr.append("d{N}".format(N=ntgo.dcnt))
          if 'tinfo' in prt_flds:
              hdr.append("i{I:4.02f}".format(I=ntgo.tinfo))
          if 'REL' in prt_flds:
              hdr.append("{R}".format(R=ntgo.REL_short))
          return " ".join(hdr)
docs: Header for GO Term box. Ex: 'G0001719 L6 D9 d3.