docs: def p_iteration_statement_6(self, p):
          """
          iteration_statement \
            : FOR LPAREN VAR identifier initializer_noin IN expr RPAREN statement
          """
          vardecl = self.asttypes.VarDeclNoIn(
              identifier=p[4], initializer=p[5])
          vardecl.setpos(p, 3)
          p[0] = self.asttypes.ForIn(item=vardecl, iterable=p[7], statement=p[9])
          p[0].setpos(p)