Check which es2015 feature babel-preset-react-native dose not have

compareBabelPlugins.js

const rnKeys = [ 'babel-plugin-react-transform',
  'babel-plugin-syntax-async-functions',
  'babel-plugin-syntax-class-properties',
  'babel-plugin-syntax-trailing-function-commas',
  'babel-plugin-transform-class-properties',
  'babel-plugin-transform-es2015-function-name',
  'babel-plugin-transform-es2015-arrow-functions',
  'babel-plugin-transform-es2015-block-scoping',
  'babel-plugin-transform-es2015-classes',
  'babel-plugin-transform-es2015-computed-properties',
  'babel-plugin-check-es2015-constants',
  'babel-plugin-transform-es2015-destructuring',
  'babel-plugin-transform-es2015-modules-commonjs',
  'babel-plugin-transform-es2015-parameters',
  'babel-plugin-transform-es2015-shorthand-properties',
  'babel-plugin-transform-es2015-spread',
  'babel-plugin-transform-es2015-template-literals',
  'babel-plugin-transform-es2015-literals',
  'babel-plugin-transform-flow-strip-types',
  'babel-plugin-transform-object-assign',
  'babel-plugin-transform-object-rest-spread',
  'babel-plugin-transform-react-display-name',
  'babel-plugin-transform-react-jsx-source',
  'babel-plugin-transform-react-jsx',
  'babel-plugin-transform-regenerator',
  'babel-plugin-transform-es2015-for-of' ];

const es2015Keys = [ 'babel-plugin-check-es2015-constants',
  'babel-plugin-transform-es2015-arrow-functions',
  'babel-plugin-transform-es2015-block-scoped-functions',
  'babel-plugin-transform-es2015-block-scoping',
  'babel-plugin-transform-es2015-classes',
  'babel-plugin-transform-es2015-computed-properties',
  'babel-plugin-transform-es2015-destructuring',
  'babel-plugin-transform-es2015-duplicate-keys',
  'babel-plugin-transform-es2015-for-of',
  'babel-plugin-transform-es2015-function-name',
  'babel-plugin-transform-es2015-literals',
  'babel-plugin-transform-es2015-modules-amd',
  'babel-plugin-transform-es2015-modules-commonjs',
  'babel-plugin-transform-es2015-modules-systemjs',
  'babel-plugin-transform-es2015-modules-umd',
  'babel-plugin-transform-es2015-object-super',
  'babel-plugin-transform-es2015-parameters',
  'babel-plugin-transform-es2015-shorthand-properties',
  'babel-plugin-transform-es2015-spread',
  'babel-plugin-transform-es2015-sticky-regex',
  'babel-plugin-transform-es2015-template-literals',
  'babel-plugin-transform-es2015-typeof-symbol',
  'babel-plugin-transform-es2015-unicode-regex',
  'babel-plugin-transform-regenerator' ];

es2015Keys.forEach(aPlugin => {
  if(!rnKeys.includes(aPlugin)) {
    console.warn(`Missing ES2015 feature! ${aPlugin}`);
  }
});