text: import React from 'react'
  import { Text, View, Button, StyleSheet } from 'react-native'
  import PropTypes from 'prop-types'
  
  class Comments extends React.Component {
    render () {
      const { navigation } = this.props
  
      return (
        <View style={ styles.container }>
          <Text>Comments</Text>
          <Button title="Autor" onPress={ () => navigation.navigate('Author') }/>
        </View>
      )
    }
  }
  
  Comments.propTypes = {
    navigation: PropTypes.object
  }
  
  const styles = StyleSheet.create({
    container: {
      flex: 1,
      justifyContent: 'center'
    }
  })
  
  export default Comments
  