code: def get_table(self, schema_type):
          
          table_name = schema_type.lower()
          if not self.has_table(table_name):
              raise exceptions.GraphQLCompilationError(
                  'No Table found in SQLAlchemy metadata for table name "{}"'.format(table_name)
              )
          return self.table_name_to_table[table_name]
docs: Retrieve a SQLAlchemy table based on the supplied GraphQL schema type name.