如何将变量传递给Apollo突变组件？

import { Mutation } from 'react-apollo';
import { gql } from 'apollo-boost';

const UPDATE_CONFIG_MUTATION = gql`
  mutation UpdateConfig($variable: String!) {
    updateConfig(variable: $variable) {
      // 突变操作的返回结果
    }
  }
`;

const MyComponent = () => (
  <Mutation mutation={UPDATE_CONFIG_MUTATION}>
    {(updateConfig, { data }) => (
      <button onClick={() => {
        const variable = 'example'; // 要传递的变量
        updateConfig({ variables: { variable } });
      }}>
        Update Config
      </button>
    )}
  </Mutation>
);