How to use the react-jsonschema-form/lib/utils.setState function in react-jsonschema-form

.then(filesInfo => {
        const state = {
          values: filesInfo.map(fileInfo => fileInfo.dataURL),
          filesInfo
        };
        setState(this, state, () => {
          if (multiple) {
            onChange(state.values);
          } else {
            onChange(state.values[0]);
          }
        });
      });
  };

asyncSetState(state, options = {validate: false}) {
    setState(this, state, () => {
      this.props.onChange(this.state.value, options);
    });
  }

asyncSetState(state, options = {validate: false}) {
    setState(this, state, () => {
      this.props.onChange(this.state, options);
    });
  }

asyncSetState(state, options = {validate: false}) {
    setState(this, state, () => {
      this.props.onChange(this.state.items, options);
    });
  }