title: How to fix - Name non-constant identifiers using lowerCamelCase
body: <p>I have created a flutter application and added a custom theme data (themes.dart)</p>
  
  <p>Now everything works fine when I run it but I keep getting the error (Name non-constant identifiers using lowerCamelCase.)</p>
  
  <p>I'm not really sure why it is complaining even though the application runs on my device.
  How do I fix this issue?</p>
  
  <pre><code>class CustomColors {
    // Must begin with lower-case character!
    final NovaWhite = Color(0xffecf0f1);  
  }
  
  ThemeData BaseThemeData() { // I get a complaint on BaseThemeData
    final ThemeData base = ThemeData.light();
  
    TextTheme _baseTextTheme(TextTheme base) {
      return base.copyWith(
  
        ),
      );
    }
  }
  </code></pre>