code: def showstructure(self, dataman=True, column=True, subtable=False,
                        sort=False):
          
          return self._showstructure(dataman, column, subtable, sort)
docs: Show table structure in a formatted string.
  
          The structure of this table and optionally its subtables is shown.
          It shows the data manager info and column descriptions.
          Optionally the columns are sorted in alphabetical order.
  
          `dataman`
            Show data manager info? If False, only column info is shown.
            If True, data manager info and columns per data manager are shown.
          `column`
            Show column description per data manager? Only takes effect if
            dataman=True.
          `subtable`
            Show the structure of all subtables (recursively).
            The names of subtables are always shown.
          'sort'
            Sort the columns in alphabetical order?