code: def _GetSqliteSchema(self, proto_struct_class, prefix=""):
      
      schema = collections.OrderedDict()
      for type_info in proto_struct_class.type_infos:
        if type_info.__class__ is rdf_structs.ProtoEmbedded:
          schema.update(
              self._GetSqliteSchema(
                  type_info.type, prefix="%s%s." % (prefix, type_info.name)))
        else:
          field_name = utils.SmartStr(prefix + type_info.name)
          schema[field_name] = Rdf2SqliteAdapter.GetConverter(type_info)
      return schema
docs: Returns a mapping of SQLite column names to Converter objects.