how we can dry it?

index.js

   resetSelectedState() {
    const geoElement = Object.assign([], this.state.states); // create new copy to avoid mutation
    geoElement.forEach((a) => a.isSelected = false);
    this.setState({ states: geoElement });
  }
    resetSelectedCountry() {
    const geoElement = Object.assign([], this.state.countries); // create new copy to avoid mutation
    geoElement.forEach((a) => a.isSelected = false);
    this.setState({ countries: geoElement });
  }
    resetSelectedContinent() {
    const geoElement = Object.assign([], this.state.continents); // create new copy to avoid mutation
    geoElement.forEach((a) => a.isSelected = false);
    this.setState({ continents: geoElement });
  }