The source node in most cases contains the sample message as written by the developer. If it looks like a dot-delimitted string such as "form.label.firstname", then the developer has not provided a default message.

fos_comment_comment_delete fos_comment_comment_delete \..\..\..\..\..\C:/wamp64/www/scd_eve/templates\bundles\FOSCommentBundle\Thread\comment_content.html.twig\ \..\..\..\..\..\C:/wamp64/www/scd_eve/templates\bundles\FOSCommentBundle\Thread\comment_remove.html.twig\ fos_comment_comment_deleted fos_comment_comment_deleted \..\..\..\..\..\C:/wamp64/www/scd_eve/templates\bundles\FOSCommentBundle\Thread\comment_content.html.twig\ \..\..\..\..\..\C:/wamp64/www/scd_eve/templates\bundles\FOSCommentBundle\Thread\comment_content.html.twig\ fos_comment_comment_edit fos_comment_comment_edit \..\..\..\..\..\C:/wamp64/www/scd_eve/templates\bundles\FOSCommentBundle\Thread\comment_content.html.twig\ fos_comment_comment_edit_cancel fos_comment_comment_edit_cancel \..\..\..\..\..\C:/wamp64/www/scd_eve/templates\bundles\FOSCommentBundle\Thread\comment_edit.html.twig\ fos_comment_comment_edit_submit fos_comment_comment_edit_submit \..\..\..\..\..\C:/wamp64/www/scd_eve/templates\bundles\FOSCommentBundle\Thread\comment_edit.html.twig\ fos_comment_comment_new_headline fos_comment_comment_new_headline \..\..\..\..\..\C:/wamp64/www/scd_eve/templates\bundles\FOSCommentBundle\Thread\comment_new_content.html.twig\ fos_comment_comment_new_headline_first fos_comment_comment_new_headline_first \..\..\..\..\..\C:/wamp64/www/scd_eve/templates\bundles\FOSCommentBundle\Thread\comment_new_content.html.twig\ fos_comment_comment_new_submit fos_comment_comment_new_submit \..\..\..\..\..\C:/wamp64/www/scd_eve/templates\bundles\FOSCommentBundle\Thread\comment_new_content.html.twig\ \..\..\..\..\..\C:/wamp64/www/scd_eve/templates\bundles\FOSCommentBundle\Thread\new.html.twig\ fos_comment_comment_reply_cancel fos_comment_comment_reply_cancel \..\..\..\..\..\C:/wamp64/www/scd_eve/templates\bundles\FOSCommentBundle\Thread\comment_new_content.html.twig\ fos_comment_comment_reply_reply_to fos_comment_comment_reply_reply_to \..\..\..\..\..\C:/wamp64/www/scd_eve/templates\bundles\FOSCommentBundle\Thread\comment_new_content.html.twig\ fos_comment_comment_show_reply fos_comment_comment_show_reply \..\..\..\..\..\C:/wamp64/www/scd_eve/templates\bundles\FOSCommentBundle\Thread\comment_content.html.twig\ fos_comment_comment_undelete fos_comment_comment_undelete \..\..\..\..\..\C:/wamp64/www/scd_eve/templates\bundles\FOSCommentBundle\Thread\comment_content.html.twig\ fos_comment_comment_vote_score fos_comment_comment_vote_score \..\..\..\..\..\C:/wamp64/www/scd_eve/templates\bundles\FOSCommentBundle\Thread\comment_votes.html.twig\ fos_comment_thread_comment_count fos_comment_thread_comment_count \..\..\..\..\..\C:/wamp64/www/scd_eve/templates\bundles\FOSCommentBundle\Thread\comments.html.twig\