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GtkWidget *
e_mail_signature_tree_view_new (ESourceRegistry *registry);
void
e_mail_signature_tree_view_refresh (EMailSignatureTreeView *tree_view);
ESourceRegistry *
e_mail_signature_tree_view_get_registry
                               (EMailSignatureTreeView *tree_view);
ESource *
e_mail_signature_tree_view_ref_selected_source
                               (EMailSignatureTreeView *tree_view);
void e_mail_signature_tree_view_set_selected_source (EMailSignatureTreeView *tree_view,ESource *selected_source);