Method constructor

types/reactstrap-tests.tsx:1201–1205

(props: any)

class Example37 extends React.Component<any, any> {
  state: any;
  constructor(props: any) {
    super(props);
    this.toggle = this.toggle.bind(this);
    this.state = { collapse: false };
  }

  toggle() {
    this.setState({ collapse: !this.state.collapse });