parent.jsx

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

export default class extends Component {
  render () {
    if (!__DEV__) return null;
    return (
      <Text style={{
        fontSize: 22,
        fontWeight: 'bold',
        color: 'red'
      }}>
        {this._reactInternalInstance._currentElement._owner._currentElement.type.name}
      </Text>
    );
  }
}