old_contents: // @flow
  import React from 'react'
  
  import {
      StyleSheet,
      Text,
      View,
  } from 'react-native'
  
  export default function LoadingView() {
    return (
      <View style={styles.container}>
        <Text>
          Loading…
        </Text>
      </View>
    )
  }
  
  const styles = StyleSheet.create({
    container: {
      flex: 1,
      justifyContent: 'center',
      alignItems: 'center',
      backgroundColor: '#ffffff',
    },
  })
  
new_contents: // @flow
  import React from 'react'
  
  import {
      StyleSheet,
      Text,
      View,
  } from 'react-native'
  
  export default function LoadingView({text='Loading…'}: {text?: string}) {
    return (
      <View style={styles.container}>
        <Text>
          {text}
        </Text>
      </View>
    )
  }
  
  const styles = StyleSheet.create({
    container: {
      flex: 1,
      justifyContent: 'center',
      alignItems: 'center',
      backgroundColor: '#ffffff',
    },
  })
  
subject: allow custom text in LoadingView