code: def get_declaration(self):
          
          if self.is_opaque:
              out = "{strrep} = type opaque".format(strrep=str(self))
          else:
              out = "{strrep} = type {struct}".format(
                  strrep=str(self), struct=self.structure_repr())
          return out
docs: Returns the string for the declaration of the type