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<?php
add_action('wp_dashboard_setup', function() {
  global $wp_meta_boxes;
  $title = 'Theme Support'
  wp_add_dashboard_widget('custom_help_widget', $title, 'content');
});
 
function content() {
  echo '<p>Welcome to Custom Blog Theme! Need help? Contact the developer <a href="mailto:yourusername@gmail.com">here</a>. For WordPress Tutorials visit: <a href="https://www.wpbeginner.com" target="_blank">WPBeginner</a></p>';
}