B.jsx

// @flow

import React, {Component} from 'react';
import type {ComponentType} from 'react';
import {
  View,
  Text
} from 'react-native';

import hoc from './hoc';

type State = {
  value: string  
}
class B extended Component<any, State> {
  state = {value: 'Hello B'}
  render(){
    return(<View><Text>{this.state.value}</Text></View>)
  }
};
        
export default hoc(B);