EHTMLEditorHRuleDialog
GObject ╰── GInitiallyUnowned ╰── GtkWidget ╰── GtkContainer ╰── GtkBin ╰── GtkWindow ╰── EHTMLEditorDialog ╰── EHTMLEditorHRuleDialog
GtkWidget * e_html_editor_hrule_dialog_new (EHTMLEditor *editor);
EHTMLEditor *editor