text: import React from 'react';
  import darkBaseTheme from 'material-ui/styles/baseThemes/darkBaseTheme';
  import MuiThemeProvider from 'material-ui/styles/MuiThemeProvider';
  import getMuiTheme from 'material-ui/styles/getMuiTheme';
  import AppBar from 'material-ui/AppBar';
  
  class Main extends React.Component {
    render() {
      return (
        <MuiThemeProvider muiTheme={getMuiTheme(darkBaseTheme)}>
          <AppBar title="My AppBar" />
        </MuiThemeProvider>
      );
    }
  }
  
  export default Main;
  