ReactJS - passing parameters to functions

I struggle with passing parameters to the onToggleOpen function - I render multiple markers (here only 2 for simplifying) and when I click on a marker, I want to display the respective InfoWindow for it. But when I click on the marker now, the method onToggleOpen is not triggered.

If I remove the indexes from markers and also from onToggleOpen, then the functionality of displaying and hiding InfoWindow boxes - but then all InfoWindow boxes will open and hide at the same time.

How do I properly pass the index to onToggleOpen?

const MyMapComponent = withScriptjs(withGoogleMap((props) =>
  <GoogleMap
    defaultZoom={8}
    defaultCenter={{ lat: -34.397, lng: 150.644 }}
  >
    <Marker 
        key='1'
        position={{ lat: -34.397, lng: 150.644 }} 
        onClick={props.onToggleOpen(1)}
    >
        {props.isOpen && 
            <InfoWindow onCloseClick={props.onToggleOpen}>
                <div>Something 1</div>
            </InfoWindow>
        }
    </Marker>
    <Marker 
        key='2'
        position={{ lat: -33.867855, lng: 151.178897 }} 
        onClick={props.onToggleOpen(2)}
    >
        {props.isOpen && 
            <InfoWindow onCloseClick={props.onToggleOpen}>
                <div>Something 2</div>
            </InfoWindow>
        }
    </Marker>
  </GoogleMap>
))
export default class GoogleMapsSample extends React.Component {
    constructor(props) {
        super(props)
        this.state = {
          isOpen: false
        }
        this.onToggleOpen = this.onToggleOpen.bind(this);
    }

    onToggleOpen(index){
        console.log('x');
        //this.setState({isOpen: !this.state.isOpen})
        if (this.state.isOpen === index) {
            this.state.isOpen = false;
        } else {
            this.state.isOpen = index;
        }
        console.log(this.state.isOpen);
    }

    render() {
        const { isOpen } = this.state;
        console.log('isOpen: ', this.state.isOpen);
        return (
            // Important! Always set the container height explicitly
            <div style={{ height: '100vh', width: '100%' }}>
                <MyMapComponent 
                    googleMapURL="https://maps.googleapis.com/maps/api/js?v=3.exp&libraries=geometry,drawing,places&key=AIzaSyDFD30jUKH0Cl8qrZoNCe-eEGQBIfApzE0"
                    loadingElement={<div style={{ height: `100%` }} />}
                    containerElement={<div style={{ height: `400px` }} />}
                    mapElement={<div style={{ height: `100%` }} />}
                    isOpen={isOpen}
                    onToggleOpen={this.onToggleOpen}
                />
            </div>
        );
    }
}

EDIT: I am not sure that the attribute isOpen is changed here

constructor(props) {
    super(props)
    this.state = {
      isOpen: false
    }
    this.onToggleOpen = this.onToggleOpen.bind(this);
}

...

<Marker 
    key='1'
    position={{ lat: -34.397, lng: 150.644 }} 
    onClick={()=>props.onToggleOpen(1)}
>
    {props.isOpen === 1 && 
        <InfoWindow onCloseClick={props.onToggleOpen}>
            <div>Something 1</div>
        </InfoWindow>
    }
</Marker>

because the InfoWindow block is never executed. I thought that in the function where I change the state is something wrong:

onToggleOpen(index){
    //this.setState({isOpen: !this.state.isOpen})
    if (this.state.isOpen === index) {
        this.state.isOpen = false;
    } else {
        this.state.isOpen = index;
    }
}

but here the this.state.isOpen attribute is properly changed (tested with console.log). But even though here is isOpen is changed, the InfoWindow is never displayed after clicking on the marker.

I have also tried to set its value in contructor like this:

this.state = {
  isOpen: false
}

and the InfoWindow is displayed after loading the page, but when I click on the marker, nothing happens with the InfoWindow, it will not disappear and stays displayed (even though the values in onToggleOpen() are properly changed).

What am I overlooking here? Am I passing the value isOpen incorrectly to the Marker?