-#define mutt_next_thread(x) _mutt_aside_thread(x,1,0)
-#define mutt_previous_thread(x) _mutt_aside_thread(x,0,0)
-#define mutt_next_subthread(x) _mutt_aside_thread(x,1,1)
-#define mutt_previous_subthread(x) _mutt_aside_thread(x,0,1)
-int _mutt_aside_thread (HEADER *, short, short);
-
-#define mutt_collapse_thread(x,y) _mutt_traverse_thread (x,y,M_THREAD_COLLAPSE)
-#define mutt_uncollapse_thread(x,y) _mutt_traverse_thread (x,y,M_THREAD_UNCOLLAPSE)
-#define mutt_get_hidden(x,y)_mutt_traverse_thread (x,y,M_THREAD_GET_HIDDEN)
-#define mutt_thread_contains_unread(x,y) _mutt_traverse_thread (x,y,M_THREAD_UNREAD)
-#define mutt_thread_next_unread(x,y) _mutt_traverse_thread(x,y,M_THREAD_NEXT_UNREAD)
-int _mutt_traverse_thread (CONTEXT *ctx, HEADER *hdr, int flag);
-
+#define mutt_new_parameter() p_new(PARAMETER, 1)
+#define mutt_new_header() p_new(HEADER, 1)
+#define mutt_new_envelope() p_new(ENVELOPE, 1)
+#define mutt_new_enter_state() p_new(ENTER_STATE, 1)