How to use the @shopgate/engage/filter.buildInitialFilters function in @shopgate/engage

constructor(props) {
    super(props);

    this.initialFilters = buildInitialFilters(props.filters, props.activeFilters);
    this.state = {
      currentFilters: props.activeFilters || {},
      filters: {},
    };
  }

componentWillReceiveProps({ activeFilters, filters }) {
    if (Object.keys(this.initialFilters).length > 0) {
      return;
    }

    this.initialFilters = buildInitialFilters(filters, activeFilters);
  }

reset = () => {
    this.initialFilters = buildInitialFilters(this.props.filters, {});
    this.setState({
      currentFilters: {},
      filters: {},
    });
  }

constructor(props) {
    super(props);

    this.initialFilters = buildInitialFilters(props.filters, props.activeFilters);
    this.state = {
      currentFilters: props.activeFilters || {},
      filters: {},
    };
  }

componentWillReceiveProps({ activeFilters, filters }) {
    if (Object.keys(this.initialFilters).length > 0) {
      return;
    }

    this.initialFilters = buildInitialFilters(filters, activeFilters);
  }

reset = () => {
    this.initialFilters = buildInitialFilters(this.props.filters, {});
    this.setState({
      currentFilters: {},
      filters: {},
    });
  }