text: import React from 'react'
  
  export default class ExchangesScreen extends React.Component {
    constructor (props) {
      super(props)
      console.log('ExchangesScreen constructor')
    }
    componentWillMount () {
      console.log('ExchangesScreen componentWillMount')
    }
    render () {
      console.log('ExchangesScreen render')
      return (
        <div>ExchangesScreen</div>
      )
    }
    componentDidMount () {
      console.log('ExchangesScreen componentDidMount')
    }
  }
  