content: // Contains the messages used in the app
  class Messages {
    const Messages({
      this.createButton = 'Create',
      this.textLabel = 'Enter barcode text here',
      this.formatLabel = 'Format',
      this.marginLabel = 'Margin',
      this.eccLevelLabel = 'ECC Level',
      this.widthLabel = 'Width',
      this.heightLabel = 'Height',
      this.lowEccLevel = 'Low (7%)',
      this.mediumEccLevel = 'Medium (15%)',
      this.quartileEccLevel = 'Quartile (25%)',
      this.highEccLevel = 'High (30%)',
      this.invalidText = 'Please enter some text',
      this.invalidWidth = 'Invalid width',
      this.invalidHeight = 'Invalid height',
      this.invalidMargin = 'Invalid margin',
    });
  
    final String createButton;
  
    final String textLabel;
    final String formatLabel;
    final String marginLabel;
    final String eccLevelLabel;
    final String widthLabel;
    final String heightLabel;
  
    final String lowEccLevel;
    final String mediumEccLevel;
    final String quartileEccLevel;
    final String highEccLevel;
  
    final String invalidText;
    final String invalidWidth;
    final String invalidHeight;
    final String invalidMargin;
  }
  