content: // Import libraries for making a component
  import React from 'react';
  import {
    StyleSheet,
    View,
  } from 'react-native';
  
  // Make a component
  const Card = props => (
    <View style={styles.containerStyle}>
      {props.children}
    </View>
  );
  
  // ========================================================
  // PropTypes check
  // ========================================================
  Card.propTypes = {
    children: React.PropTypes.node.isRequired,
    // children: React.PropTypes.element.isRequired, // for single child
  };
  
  // ========================================================
  // Styles
  // ========================================================
  const styles = StyleSheet.create({
    containerStyle: {
      borderWidth: 1,
      borderRadius: 2,
      borderColor: '#ddd',
      borderBottomWidth: 0,
      shadowColor: '#000',
      shadowOffset: { width: 0, height: 2 },
      shadowOpacity: 0.1,
      shadowRadius: 2,
      elevation: 1,
      marginLeft: 5,
      marginRight: 5,
      marginTop: 10,
    },
  });
  
  // ========================================================
  // Exports
  // ========================================================
  // Make the component available to other parts of the app
  export { Card };
  