react-virtualized Feed Scroller with varying heights

Scroller.js

class Scroller extends React.Component {
  _cache = new CellMeasurerCache({ defaultHeight: 100, fixedWidth: true });
  _mostRecentWidth = 0;
  constructor(props) {
    super(props);
    this.state = {
      localCache: []
    }
  }
  componentDidMount(){
    this._loadData(0); 
  }
  ._loadData = (offset, callback) => {
    //Loads data from server and sets it in this.state.localCache
  }
  _recomputeRowHeights = (index) => {
    if (this._list) {
      console.log('Recomputing');
      this._cache.clearAll();
      this._list.recomputeRowHeights(index);
    }
  }
  _isRowLoaded = ({ index }) => {
    return !!this.state.localCache[index];
  }
  _loadMoreRows = ({ startIndex, stopIndex }) => {
    this._loadData(startIndex, (() => {
      this._recomputeRowHeights();
      promiseResolver
    }));
    let promiseResolver;
    return new Promise((resolve) => {
      promiseResolver = resolve;
    });
  }
  rowRenderer = ({ index, key, style, parent }) => {
    const row = this.state.localCache[index];
    let content;
    if (row) {
      content = (<Feed data={row} style={style}/>);
    } else {
      content = (<CustomLoader style={style} />);
    }
    return (
      <CellMeasurer
        cache={this._cache}
        columnIndex={0}
        key={key}
        parent={parent}
        rowIndex={index}
        width={this._mostRecentWidth}
      > 
        {content} 
      </CellMeasurer>);
  }
  _setListRef = (ref) => {
    this._list = ref;
    this._registerList(ref);
  };
  render() {
    const { localCache } = this.state;
    return (
      <div className="flex_grow">
        <InfiniteLoader
          isRowLoaded={this._isRowLoaded}
          loadMoreRows={this._loadMoreRows}
          rowCount={10}
        >
          {({ onRowsRendered, registerChild }) =>
            <AutoSizer disableHeight>
              {({ width, height }) => {
                this._mostRecentWidth = width;
                this._registerList = registerChild;
                return (
                  <List
                    deferredMeasurementCache={this._cache}
                    overscanRowCount={1}
                    ref={this._setListRef}
                    height={height}
                    onRowsRendered={onRowsRendered}
                    rowCount={10}
                    rowHeight={this._cache.rowHeight}
                    rowRenderer={this.rowRenderer}
                    width={width}
                  />
                ) 
              }
              }
            </AutoSizer>}
        </InfiniteLoader>
      </div>
    );
  }
}