rowData.adult = !rowData.adult;
    var dataClone = this.state.familyData;
    dataClone[rowID] = rowData;
    this.setState(state => ({
      familyData: this.state.familyData.cloneWithRows(dataClone),
    }));

Presscall(rowID) {
    var url = 'http://api.themoviedb.org/3/movie/now_playing?api_key=17e62b78e65bd6b35f038505c1eec409';
    fetch(url)
      .then(response => response.json())
      .then(jsonData => {
        console.log("data", jsonData.results[rowID].adult);
        jsonData.results[rowID].adult = true;
        var dataclone = jsonData.results;
        this.setState({
          familyData: this.state.familyData.cloneWithRows(dataclone),
          fetching: false`enter code here`
        });
        console.log("data", jsonData.results[rowID].adult);
      })
      .catch(error => console.log('Error fetching: ' + error));
  }