old_contents: import React from 'react';
  import PropTypes from 'prop-types';
  import yubikiri from 'yubikiri';
  
  import ObserveModel from '../views/observe-model';
  import LoadingView from '../views/loading-view';
  import CommitPreviewController from '../controllers/commit-preview-controller';
  import MultiFilePatch from '../models/patch/multi-file-patch';
  
  export default class CommitPreviewContainer extends React.Component {
    static propTypes = {
      repository: PropTypes.object.isRequired,
    }
  
    fetchData = repository => {
      return yubikiri({
        multiFilePatch: new MultiFilePatch([]),
      });
    }
  
    render() {
      return (
        <ObserveModel model={this.props.repository} fetchData={this.fetchData}>
          {this.renderResult}
        </ObserveModel>
      );
    }
  
    renderResult = data => {
      if (this.props.repository.isLoading() || data === null) {
        return <LoadingView />;
      }
  
      return (
        <CommitPreviewController
          {...data}
          {...this.props}
        />
      );
    }
  }
  
new_contents: import React from 'react';
  import PropTypes from 'prop-types';
  import yubikiri from 'yubikiri';
  
  import ObserveModel from '../views/observe-model';
  import LoadingView from '../views/loading-view';
  import CommitPreviewController from '../controllers/commit-preview-controller';
  
  export default class CommitPreviewContainer extends React.Component {
    static propTypes = {
      repository: PropTypes.object.isRequired,
    }
  
    fetchData = repository => {
      return yubikiri({
        multiFilePatch: repository.getStagedChangesPatch(),
      });
    }
  
    render() {
      return (
        <ObserveModel model={this.props.repository} fetchData={this.fetchData}>
          {this.renderResult}
        </ObserveModel>
      );
    }
  
    renderResult = data => {
      if (this.props.repository.isLoading() || data === null) {
        return <LoadingView />;
      }
  
      return (
        <CommitPreviewController
          {...data}
          {...this.props}
        />
      );
    }
  }
  
subject: Load the real staged changes patch in CommitPreviewContainer