Compile error in latest firmware 0.79.1

[yasbean]

When compiling in the latest firmware, I receive the following errors:

LoadAppManifest, line 32, in file "/home/cds/source/flipperzero-firmware/scripts/fbt_tools/fbt_apps.py"
	ICONS	build/f7-firmware-D/.extapps/metronome/metronome_icons.c
	CC	applications_user/Metronome/metronome.c
applications_user/Metronome/metronome.c: In function 'render_callback':
applications_user/Metronome/metronome.c:64:43: error: implicit declaration of function 'acquire_mutex' [-Werror=implicit-function-declaration]
   64 |   const MetronomeState* metronome_state = acquire_mutex((ValueMutex*)ctx, 25);
      |                                           ^~~~~~~~~~~~~
applications_user/Metronome/metronome.c:64:58: error: 'ValueMutex' undeclared (first use in this function)
   64 |   const MetronomeState* metronome_state = acquire_mutex((ValueMutex*)ctx, 25);
      |                                                          ^~~~~~~~~~
applications_user/Metronome/metronome.c:64:58: note: each undeclared identifier is reported only once for each function it appears in
applications_user/Metronome/metronome.c:64:69: error: expected expression before ')' token
   64 |  MetronomeState* metronome_state = acquire_mutex((ValueMutex*)ctx, 25);
      |                                                              ^

applications_user/Metronome/metronome.c:116:3: error: implicit declaration of function 'release_mutex' [-Werror=implicit-function-declaration]
  116 |   release_mutex((ValueMutex*)ctx, metronome_state);
      |   ^~~~~~~~~~~~~
applications_user/Metronome/metronome.c:116:29: error: expected expression before ')' token
  116 |   release_mutex((ValueMutex*)ctx, metronome_state);
      |                             ^
applications_user/Metronome/metronome.c:63:57: error: unused parameter 'ctx' [-Werror=unused-parameter]
   63 | static void render_callback(Canvas* const canvas, void* ctx) {
      |                                                   ~~~~~~^~~
applications_user/Metronome/metronome.c: In function 'timer_callback':
applications_user/Metronome/metronome.c:128:52: error: 'ValueMutex' undeclared (first use in this function)
  128 |   MetronomeState* metronome_state = acquire_mutex((ValueMutex*)ctx, 25);
      |                                                    ^~~~~~~~~~
applications_user/Metronome/metronome.c:128:63: error: expected expression before ')' token
  128 |  MetronomeState* metronome_state = acquire_mutex((ValueMutex*)ctx, 25);
      |                                                              ^

applications_user/Metronome/metronome.c:189:29: error: expected expression before ')' token
  189 |   release_mutex((ValueMutex*)ctx, metronome_state);
      |                             ^
applications_user/Metronome/metronome.c:126:34: error: unused parameter 'ctx' [-Werror=unused-parameter]
  126 | static void timer_callback(void* ctx) {
      |                            ~~~~~~^~~
applications_user/Metronome/metronome.c: In function 'metronome_app':
applications_user/Metronome/metronome.c:265:3: error: unknown type name 'ValueMutex'
  265 |   ValueMutex state_mutex;
      |   ^~~~~~~~~~
applications_user/Metronome/metronome.c:266:7: error: implicit declaration of function 'init_mutex' [-Werror=implicit-function-declaration]
  266 |   if(!init_mutex(&state_mutex, metronome_state, sizeof(MetronomeState))) {
      |       ^~~~~~~~~~
applications_user/Metronome/metronome.c:287:56: error: implicit declaration of function 'acquire_mutex_block' [-Werror=implicit-function-declaration]
  287 |     MetronomeState* metronome_state = (MetronomeState*)acquire_mutex_block(&state_mutex);
      |                                                        ^~~~~~~~~~~~~~~~~~~
applications_user/Metronome/metronome.c:379:3: error: implicit declaration of function 'delete_mutex' [-Werror=implicit-function-declaration]
  379 |   delete_mutex(&state_mutex);
      |   ^~~~~~~~~~~~
cc1: all warnings being treated as errors
	SDKCHK	firmware/targets/f7/api_symbols.csv
scons: *** [build/f7-firmware-D/.extapps/metronome/metronome.o] Error 1
API version 18.1 is up to date

********** FBT ERRORS **********
build/f7-firmware-D/.extapps/metronome/metronome.o: Error 1