in deprecated-react-native-listview/index.js [573:582]
_onContentSizeChange: function(width: number, height: number) {
const contentLength = !this.props.horizontal ? height : width;
if (contentLength !== this.scrollProperties.contentLength) {
this.scrollProperties.contentLength = contentLength;
this._updateVisibleRows();
this._renderMoreRowsIfNeeded();
}
this.props.onContentSizeChange &&
this.props.onContentSizeChange(width, height);
},