metamask-extension/ui/app/higher-order-components/initialized/initialized.container.js

import { connect } from 'react-redux'
import Initialized from './initialized.component'

const mapStateToProps = state => {
  const { metamask: { completedOnboarding } } = state

  return {
    completedOnboarding,
  }
}

export default connect(mapStateToProps)(Initialized)