1render() {
2    return (
3        <MapView>
4            {this.state.pois && this.state.pois.map(marker => (
5                <CustomMarker
6                    key={marker.id}
7                    isZoomed={this.isMapZoomed(this.state.displayedRegion)}
8                />
9            ))}
10        </MapView>
11    );}